PDF malware analysis — malicious · dacac4bdc7574760

MALICIOUS

PDF

98.1 KB Created: 2021-06-26 03:06:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 42f7da93e792e2fb3f4fe7bb9e8d5745 SHA-1: 6f7aa9dece7d3b65dcf092b3e49dc84b4a1da537 SHA-256: dacac4bdc757476050e637e7eb9d2afe4ce308a47f2ddffd15adab9fff418b73

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous heuristics point to the PDF being a link farm, with many URLs hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution scheme. The embedded URLs are likely used to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9374

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160804b2e87c57---vagonofolifa.pdf In PDF document text
- https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/1fe09e00a4324ec5d0191ab315b27c53/46185852289.pdfIn PDF document text
- https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5dcdbae7a1---53873118106.pdfIn PDF document text
- https://iguanapools.com.au/wp-content/plugins/super-forms/uploads/php/files/qfr7j85i7ntvtf2tq3c58pb519/witizogadexizamotaxab.pdfIn PDF document text
- https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/0vi74ghpkb2ssfl2huenc2b9cb/35130274920.pdfIn PDF document text
- https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074451dac545---kufajorizimogidivuni.pdfIn PDF document text
- http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7db54961a---94026317859.pdfIn PDF document text
- http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac5a2b251a---89028395681.pdfIn PDF document text
- http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/tqua5rr5lv3fpi74j9ub776m21/93624639306.pdfIn PDF document text
- http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/f57a75ee9f30287b529abf28d02b09fb/tidipepujujo.pdfIn PDF document text
- https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/be1023ed084641dd7c6e6f4d1a301453/suwuwivimudunavalizemo.pdfIn PDF document text
- https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088dc8b4e73e---bokalekafiwoxo.pdfIn PDF document text
- http://elementsgogreen.com/userfiles/file/2146709292.pdfIn PDF document text
- http://elitaliaweb.it/upload/file/pawubofokipekekuzuxi.pdfIn PDF document text
- https://riolospettacoli.it/filesUploads/file/zolumejunu.pdfIn PDF document text
- https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/pun0bbngl7ja6tmmbheqg7j4g5/buwogemibopuvula.pdfIn PDF document text
- https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3c09a303a---xubodatuwerukopotalilufu.pdfIn PDF document text
- http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0a8274606---93111230379.pdfIn PDF document text
- http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160796fa7ad353---10087761695.pdfIn PDF document text
- http://aqbnb.com/uploadfile/file/78090698890.pdfIn PDF document text
- http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84ab68520c---rufuvi.pdfIn PDF document text
- https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/4adc923d6ccaeeaf2a37c5e18b42a645/36481127167.pdfIn PDF document text
- http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/d7a797254855174e46e42c48e0722d20/36477161517.pdfIn PDF document text
- http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608679169ee0f---17375165315.pdfIn PDF document text
- http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608944d65d915---6084326985.pdfIn PDF document text
- https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/65570f5cbb46bbbb4af2f766b77af075/baxuduvowokedoletujebe.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=emplacement+in+englishPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00011cd9.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x11CD9	18484 bytes
SHA-256: `f8fa77add2095f13b2849d41937030019b0044fd25db1d56825f0519ee4e5d0d`
`font_00_sfnt_off0000e1b0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE1B0	24036 bytes
SHA-256: `da21f114e2a40923bdf27ee9258dfe4297ac14e5d898d591a95022318dcf02ab`
`font_02_sfnt_off00013b17.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13B17	10584 bytes
SHA-256: `c53099148ad026083b50c1f6964cd94dae67a98d0e12308786660f60962d1a00`
`font_03_sfnt_off00015304.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15304	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_04_sfnt_off00016b11.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16B11	3464 bytes
SHA-256: `a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff`

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