Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fad900edfb8c819…

MALICIOUS

PDF

81.7 KB Created: 2021-09-05 02:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9ab2397d47336d350ff783c1350adf7d SHA-1: 8e968a1544dac61f41652b8e4a1564aa105ba768 SHA-256: 9fad900edfb8c81997d0adefd95b081facd54bbf6ab956de578c271b6cb05877
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://wastran.ru/uplcv?utm_term=holt+mcdougal+algebra+1+answer+key+pdf PDF link annotation
    • https://sayurhijau.com/contents//files/89934665542.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/a1da52bff36823723c96eacf87991c89/65713803047.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b498640d498---24313112200.pdfIn PDF document text
    • https://xaydungdonggia.com/app/webroot/files/images/pages/files/ranofinaweruwedivirar.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/d664d752fb281bf8e664651d59a64498/84791885607.pdfIn PDF document text
    • https://cbconsulting112.ca/userfiles/files/72399574594.pdfIn PDF document text
    • http://hawaiianhunareiki.it/file/18468880323.pdfIn PDF document text
    • https://beautyreviveshop.com/newerac2c/userfiles/file/62439236247.pdfIn PDF document text
    • http://wolfpackbasketballacademy.com/content_docs/jowatutapufuzuwag.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/37194970217.pdfIn PDF document text
    • https://bodymason.com/user_uploads/files/69887813476.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c79f7490b80---nulegisiwavomoluguloruku.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/81a789447b1d0d1c26f199df8b7275bf/32313730605.pdfIn PDF document text
    • http://shopphutungmayphat.com/upload/img/files/94526938936.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988594dcd78---30262096460.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/gazuwofexikezavokadakudot.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/87715857607.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160c885f0a3613---90522744899.pdfIn PDF document text
    • http://korvet-sp.ru/userfiles/file/zetenozazivaxigeduvi.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2907f5d8cef6d34ef6085e85c67ffed9/bilolifujopeledokume.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/240mrdvqufv83519oaubeosuij/jesoledot.pdfIn PDF document text
    • https://channeloflove.com/ckfinder/userfiles/files/nikixekuvimifeniximanu.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/3af31994b28f5f716d7cfcd25ba91ccf/fuvabefodigadobudewe.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090bcadac72d---31977658427.pdfIn PDF document text
    • https://everestart.com/images/stories/file/8694944838.pdfIn PDF document text
    • 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.

FilenameKindSourceSize
font_00_sfnt_off0000d720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD720 18124 bytes
SHA-256: 0e5577bace9dffdfecd664d467106d7238281fed3d165332beec10e89f8e6ee6
font_01_sfnt_off00010688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10688 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9F 11444 bytes
SHA-256: 716ea5b794abcd2b76d731de8c140d76b8851440f3b9ec3c67114bc4d620223a

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