Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec95725447120f3…

MALICIOUS

PDF

86.6 KB Created: 2021-07-03 00:19:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7598fe6fb531c85973813f3e060a1f9c SHA-1: 37090578a7b004b94e852660aa0580f1e8eaca7d SHA-256: 7ec95725447120f319264b840cab1480c0cf1df05ee3c0c34dcece1458cca63b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to compromised websites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The document's structure as a link farm on disposable or compromised hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://irlanc.ru/uplcv?utm_term=total+cost+of+ownership
    • https://cmetrix.net/ckfinder/userfiles/files/37615915534.pdf
    • http://www.hydro-tg.pro/upload/file/78738061909.pdf
    • https://bnovum.hu/downloads/72071878212.pdf
    • http://weymouthhighschool1960.com/clients/9/96/9679770cb43d952edac6f872f7aef95c/File/87749106708.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a7cd2e95d---86850153878.pdf
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/0989034de32cd42fc98da15c9b452c87/98861845125.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d00e2fa583a---togizipufumujolazidavun.pdf
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077789c267a4---79960347706.pdf
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/bonomezadazowiwoj.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/0o05raal7qfekn2jqe3085rgc6/22578971066.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/56ab1277e7895a2847215f6180f597d5/zetizozotemenetefep.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/43d63013e8cae3b142d3bd94a5230a36/mufoxijaralosinule.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16091cf7697962---pofegujup.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16078068f98c05---88466313718.pdf
    • http://coss-wynn-reunion.com/clients/d/db/dbe3622004495b304d8703879a486b7d/File/48806105920.pdf
    • http://www.awakohchang.com/image/upload/File/akizopivemeni.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/9d4cd0752e24d525c2422feaf33db42d/xosegututefawukapavera.pdf
    • http://innotack.com/userfiles/files/bigor.pdf
    • https://ferado.vn/userfiles/file/texakozu.pdf
    • http://biznesfishki.ru/files/userfiles/files/lunibudavudagazax.pdf
    • http://scro.ru/pic/file/dotiwariso.pdf
    • https://milsagliksen.org/upload/ckfinder/files/57722505491.pdf
    • http://orderkai.com/uploads/files/69943422613.pdf
    • http://pytextiles.com/userfiles/file/xanokolo.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c74b5cfc36---zadinajenevuvawupaxepulo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eba2.bin
5f9f07ab57a26150a8749e030683583e9988ec5f489ef3c5dcc0bc98da36381d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA2 18424 bytes
font_01_sfnt_off00011caf.bin
8942792adaa02e80cf7576883607e9259097b6a9faa22186dd91c6f06cc0a941
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CAF 10624 bytes
font_02_sfnt_off00013504.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13504 16792 bytes