Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe02f1074d1fc80…

MALICIOUS

PDF

94.4 KB Created: 2021-07-01 17:25:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e14f267dd588a342d34aae9d210f0003 SHA-1: a4c4b85a734d7bd596d3b93509d7c2bbc79fb6f8 SHA-256: afe02f1074d1fc80c497399c7c25e2cf565bad633f696122e164031e382e1bef
164 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards exploitation or redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ecohouse-lab.com/userfiles/file/wotijabilabajat.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/d5168afaa94f87eb79199247c75bbbfd/1062883510.pdf
    • http://afgventuregroup.com/cfiles/file/30838698912.pdf
    • http://michellesmithscott.com/clients/36670/File/84056720016.pdf
    • http://bainihu.com/upfiles/editor/files/31655088254.pdf
    • https://xo-sound.ru/userfiles/file/xegolufejivufolivekoka.pdf
    • http://iseveranscopy.com/upload/editor/file/4255369610.pdf
    • https://pet-fashion.ro/mm/file/zafejomutuxewofov.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160714749d4739---zajom.pdf
    • http://deauville.ru/files/file/98067216227.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ad0a0b31a22---konux.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/27odue3f9etdeo5v4k0ng8g2dp/29876164305.pdf
    • http://tate79.com/clients/868750/File/24388430998.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa57c952a4---67025884902.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160943b1d20bbb---zavovegugeligaxage.pdf
    • https://mfdesign.hu/files/file/muxinoxari.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/5eeab3b9159254d9a42a00b247686bb4/pugagimijiwo.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607fde1a60f75---45129820972.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2632ef5c0---tujovesojufolewibemol.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9de6b123b---7857176694.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/42965b7c23ea0954877a22098b2db655/retexazomopamawajofoteni.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/2a52487d559c7a7393f63b1900b2291e/84845526042.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=best+selling+series+of+all+time
    • 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_off00010f53.bin
bf8b9cc4300a8b7783b385f948c8376f90e8cf4cceeb94798b5eb55ad7ed5c73
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F53 10608 bytes
font_01_sfnt_off0001279a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1279A 16792 bytes
font_02_sfnt_off00013fac.bin
8e53740990b6d54e1f997b5344a899434855d23a380024c391420fd391669913
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FAC 17228 bytes