Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ddeee1c078756b1…

MALICIOUS

PDF

93.2 KB Created: 2021-07-03 01:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: da785d546c66eb5ff6ad6d013ba7f1a2 SHA-1: 1e6682bdb6e8f22dbee727840a6897e4d499e9d1 SHA-256: 7ddeee1c078756b146c2149550ca28c25f6d20cfa389ce0e20e0346bae3da634
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host malicious content or redirect users to phishing sites. While no scripts were directly extracted, the nature of the URLs and the 'link farm' heuristic indicate a probable intent to deliver a secondary payload or facilitate phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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 http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bc411093366---75098456507.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777bd80638e---24125936992.pdf
    • http://cichanski.com/Upload/file/ronilivawakuk.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/dle4q85201guarvsm4ibi2pbd5/53904182024.pdf
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/a80655777c4f9b0826b7c91f826acfd5/86199524851.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf60980b22---godizodupudagofokig.pdf
    • http://koryosushi.com/uploads/files/29903387643.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16093fcd686c5e---61538274625.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b274106e1c---bupawegofirumutiburedoj.pdf
    • http://bachtungcompany.com/upload/files/miritawatijetepavoke.pdf
    • http://golden-candies.ru/webroot/files/files/11368100597.pdf
    • http://pokeocncafe.com/uploads/files/xisuwenivixakig.pdf
    • https://tosto.cl/ckfinder/userfiles/files/49328314230.pdf
    • https://sailstudy.in/ckfinder/userfiles/files/46920480893.pdf
    • http://hoctienganh123.net/upload/files/jopoguvexoforowekofotakad.pdf
    • https://mfdesign.hu/files/file/68880836800.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/b84537af6c6541d93f51fb26309e4eed/wowapiloxiser.pdf
    • https://rosewoodcity.org/nbloom/fckuploads/file/kimifisa.pdf
    • http://bielwod.com/userfiles/file/jubufodisubogeme.pdf
    • https://thaiahpa.com/flash/files/65469214594.pdf
    • https://tidaksusah.com/contents//files/tafikomomanujaxogoremaf.pdf
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/16f2f9e3070a6b5de233a7de3604d829/50707417360.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abdc034e710---birutovajines.pdf
    • http://dancephoto.ru/userfiles/files/46962345302.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=the+cards+on+scoreboards+crossword+clue
    • 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_off0001086c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1086C 16792 bytes
font_01_sfnt_off0001207e.bin
a5ed8c369d1bf87344d08e776558d151a7efb50eeab33393e4032c5cf38114a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1207E 17820 bytes
font_02_sfnt_off00014f22.bin
863ac95a9f5185b71dc61c3c459dbc0a3329f40d569d3e4d3da04230aa1c83dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x14F22 10568 bytes