Malicious PDF — malware analysis report

Static analysis result for SHA-256 49030611814306b0…

MALICIOUS

PDF

85.9 KB Created: 2021-07-09 16:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2005e3c1a3dec0a6ad18a9fd72895400 SHA-1: afd451df58877d990fc85510ec5f18feb690a926 SHA-256: 49030611814306b0cc848c514efa57a1a685a556ef0c3b4f45de2fed423f422e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs and is identified as a link farm, with many links pointing to compromised WordPress upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and appears to contain embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=fixed+income+risk+management
    • http://www.kickcommerce.com/userfiles/file/76738536508.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e121be54a---13028693091.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/9e2c7afd1500b03541a4810f6e4fac45/tenut.pdf
    • http://hpmcfamilyreunion1968.com/clients/83891/File/bewufimerutipiti.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/9dfb7f9b738b4675deaf367aebc3ddd6/rirozatigavaronalexiguvix.pdf
    • http://backupcenters.com/userfiles/file/vumurotuwat.pdf
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/49gf02moqurajgadpnrj6bkt2k/lavofobavogunevumezepofew.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4966fecd04---fufitakoxenagijivisitexu.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/027b044932810ac2181cf98aaabf5dc3/nuguj.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16093d18016e73---noxofena.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/i5qep13o70ul3e9553a67fvtmd/98951408759.pdf
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/5a585ba62e781f44bd0910b9862a7fb6/31529592694.pdf
    • http://gospelinamerica.com/clients/874377/File/12920862805.pdf
    • http://juentai.com/userfiles/files/sedarusarasobibemupota.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160a30485be08b---denusuvulemawobomam.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c233f92fdd---donenixogazexiwivibobon.pdf
    • https://mebelihome.ru/upload_picture/92824548824.pdf
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/emonncr5fjqru7td401kgiu906/2784439027.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/b16451788fab86bb49aac1598c4cc586/61622510554.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/f3b5fb9901dda67e924a48b85be94446/79863249999.pdf
    • http://anhuifan.com/upload_fck/file/2021-4-29/20210429232002589842.pdf
    • https://getadoc.in/ckfinder/userfiles/files/20103133316.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_off0000e99b.bin
beb424a0b4745717929525937bcdcbd277b028cf05406609478c72e89d8553f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE99B 10836 bytes
font_01_sfnt_off00010265.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10265 16792 bytes
font_02_sfnt_off00011a77.bin
f7ea32432d3cc311bcfa90207dce5c68019807d32d13684078acc4f6ca02e84f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A77 18904 bytes