PDF malware analysis — malicious · 77ddb3404d0b9bc1

MALICIOUS

PDF

86.0 KB Created: 2021-09-01 20:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 968861c84a5ac8ae4b0d1fc6961ac401 SHA-1: d28715d49dda1dd12ff878fbbc072d2bb79353ec SHA-256: 77ddb3404d0b9bc1678084c6129662773ce3c02a5a70c5f7cf8ad35522502e15

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9765

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://atthaya.com/file_media/file_image/file/67424601105.pdf In PDF document text
- http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8baaf05c3---sekaxetek.pdfIn PDF document text
- https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/9701e52ca1ff429575145540c495a2ff/fiworogu.pdfIn PDF document text
- http://comlark.ru/userfiles/files/14540403182.pdfIn PDF document text
- https://duext.com/wp-content/plugins/super-forms/uploads/php/files/0c3ecc19b599be151cb2f55389c2f315/2230399175.pdfIn PDF document text
- http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b62f5fd7857---18494783855.pdfIn PDF document text
- http://satisfytech.com/ck/upload/files/501178389.pdfIn PDF document text
- http://robalton.es/Albums/images/file///mozulaxaxobej.pdfIn PDF document text
- https://groupunsur3.com/contents/files/44138225584.pdfIn PDF document text
- http://africalegal.nl/userfiles/file/lomozuwarujaranebitipir.pdfIn PDF document text
- http://lukoilmarine.com/ckfinder/userfiles/files/raxavofam.pdfIn PDF document text
- https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/q3cacltvtlfkej4cuhejdsmu47/rojifa.pdfIn PDF document text
- https://eletvital.hu/uploads/files/6902950447.pdfIn PDF document text
- http://kojeneckezbozi.eu/userfiles/file/64378921836.pdfIn PDF document text
- http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16072e144163e8---96979325035.pdfIn PDF document text
- http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c13aa75187d---4539644400.pdfIn PDF document text
- http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2bac14e61---mabonetiwogezagijokarap.pdfIn PDF document text
- https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/ludazirumowuzo.pdfIn PDF document text
- https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/18htniss8rll96cpfprdeg84t0/mumufazafinar.pdfIn PDF document text
- https://www.antoniopopolizio.it/ckfinder/userfiles/files/34326113986.pdfIn PDF document text
- http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607475009fb0e---12162721035.pdfIn PDF document text
- https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16119804ec6636---65321401312.pdfIn PDF document text
- https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f64ceb86d9a---75490654204.pdfIn PDF document text
- http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92be6f6ca---93852766102.pdfIn PDF document text
- http://cortabellanews.com/userimages/guwesifijudisatevaj.pdfIn PDF document text
- https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7961c46c6---23157269196.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=you+are+my+friend+in+spanishPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cd97.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCD97	10816 bytes
SHA-256: `6d7d6c0d1600510108f57ef5c773f4a7ee66d7a6e8ddae04c04f27fb6d591e26`
`font_01_sfnt_off0000e654.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE654	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000fe66.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE66	21496 bytes
SHA-256: `b1a68e7602a8e78d32e0c3873d4f4a7b4160af295de02ecc48c6f5f69301a111`
`font_03_sfnt_off000133fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x133FB	16060 bytes
SHA-256: `64af0185a2beffa7382febdf957b2ddd2015d3985e5bc97cf8ad64f3c2914973`

Open this report in the interactive analyzer, or submit your own file for analysis.