PDF malware analysis — malicious · 44539173014b3d68

MALICIOUS

PDF

78.6 KB Created: 2021-09-23 05:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: d0c6e1872a7f27a08a6d6c5be81d2994 SHA-1: 39f1c09cf0174804529b9dc4f1a4efc9e64fe486 SHA-256: 44539173014b3d689d2b7bb9c0646aa4e851843a51655e73ac6b0ad42fcd5d92

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised websites or are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or directing users to malicious content. The presence of multiple links to potentially compromised CMS upload directories suggests an attempt to distribute further malware or phishing pages.

Machine Learning

Nyx PDF Classifier malicious score 0.9953

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 https://fresh-cherries.com/ckfinder/userfiles/files/73566995679.pdf In PDF document text
- http://thevalleytrader.com/files/12495219214.pdfIn PDF document text
- http://gmart-express.com/demo/uploadpic/file/kegulenuvopinogiruju.pdfIn PDF document text
- https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/f24419f05beb8d0c905d0f52664b5467/62746416041.pdfIn PDF document text
- http://tc-muehlacker.de/data/tcmuehlacker/userfiles/file/tosogekokedosapo.pdfIn PDF document text
- https://universitecentrale.net/uploads/FCK_files/file/77430766220.pdfIn PDF document text
- http://iaestedresden.de/userfiles/file/1886854003.pdfIn PDF document text
- http://homeopathyhongkong.org/files/14683452055.pdfIn PDF document text
- https://anandalaya.in/resources/file/mibemo.pdfIn PDF document text
- http://mecateengenharia.com.br/ckfinder/userfiles/files/75638750227.pdfIn PDF document text
- https://www.scmsgroup.org/ckfinder/userfiles/files/sasuvogefesusabaleti.pdfIn PDF document text
- http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/161433e686687a---25743108118.pdfIn PDF document text
- http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613278c908e42---85388494622.pdfIn PDF document text
- https://gbp.dropship-online.com/userfiles/files/ledob.pdfIn PDF document text
- https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16132081358076---22539030478.pdfIn PDF document text
- https://gtijsr.com/userfiles/file/19487399693.pdfIn PDF document text
- http://faizleathergloves.com/userfiles/files/tigeduxafipuvibidox.pdfIn PDF document text
- http://www.salac.cz/ckfinder/userfiles/files/neninuloji.pdfIn PDF document text
- http://ranjitabiswas.com/userfiles/files/benowivefosif.pdfIn PDF document text
- http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16130f6331ac1f---96127565866.pdfIn PDF document text
- http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/m5nuke6u5tc7sci95rgsk8p2t2/tabuwupewilirisofavi.pdfIn PDF document text
- http://skpizzasubs.com/uploads/files/kujutubepuzisopofusis.pdfIn PDF document text
- http://bfcy88.com/uploads/files/56545718672.pdfIn PDF document text
- http://protok.pro/upload/files/61990257053.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=fake+location+apk+modPDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c659.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC659	10476 bytes
SHA-256: `4b12c87041adf0a7dbce844a8f10ad23b7c975106b418ac6782f1e5946b1a998`
`font_01_sfnt_off0000de0b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE0B	20868 bytes
SHA-256: `f9bfc3e00b50e52bb5e3c96c1160eaac49c7fdcbb9fa9adc93adb1b0ea629f3e`
`font_02_sfnt_off00011518.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11518	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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