Malicious PDF — malware analysis report

Static analysis result for SHA-256 501bce4311b00e47…

MALICIOUS

PDF

85.5 KB Created: 2021-06-28 19:01:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 81e97c18a466f06a879b031d452af2d9 SHA-1: 04841823ded539184e474b36f499bc68d33463ef SHA-256: 501bce4311b00e47fcebf071dad427975e6b63c4358c039bf1e689e8aae7b82a
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, likely intended to host or distribute further malicious content. The PDF itself does not contain executable scripts, but its structure and embedded links strongly suggest it's part of a phishing campaign to redirect users to malicious hosts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608371528efe0---35400257791.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160813a24a7c37---77889283662.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e98a00f9d---jawodudipalamo.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/mumb9fmnpbmibvjvihdntc7cu4/23093340912.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e7879a582---majibagu.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d23afc49a2---13910052209.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae1d0b2459---79123744213.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e474684ebf---tolasemetewemelibimedo.pdf
    • http://nickels.design/ckfinder/userfiles/files/5890668311.pdf
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/48472240980.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/31hkim31j8c3s9l0spli8t3brh/70903565740.pdf
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/e5221fa430623bc8806ab2977f998c06/volewuguk.pdf
    • http://pension-erlkoenig.de/img/editor/file/59435098139.pdf
    • https://akapacha.com/userfiles/file/86134685594.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/60f698381b5d08e17d146145f72e9389/pexijemopuxovofugux.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160829fa1c19d3---57797265874.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c15abdd0d---83937642908.pdf
    • http://bjhtdszdh.com/v15/Upload/file/2021519456327931.pdf
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e4a730e96---doxudokexupexidufabepozi.pdf
    • http://www.aadhar-interior.com/userfiles/file/jajaguwikuxok.pdf
    • http://healthywithhart.com/res/file/bivalilodemuzugenefixa.pdf
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1606c908bc9c08---30680391684.pdf
    • http://bajcsidavidfoto.com/_user/file/86364237106.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=black+white+image+to+color
    • 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_off0000ec15.bin
f5f0a361d6db9f293389279e3c9d13f3a91871bd09014a93339180ac2a36654c
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC15 17208 bytes
font_01_sfnt_off000118e7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x118E7 16792 bytes
font_02_sfnt_off000130fe.bin
ddc0cc555d4b20ce9b3f6ad9949311345f821c42f80240ff9fc1827fd26798b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x130FE 10636 bytes