Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9ee41ff7a42c065…

MALICIOUS

PDF

80.1 KB Created: 2021-09-05 16:32:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0b3397a08871da1841cd9a39ce35a034 SHA-1: 3b931e676b720c24aacc1206f0a48d3a8ac0d9e2 SHA-256: a9ee41ff7a42c0654ed9094de2c42758813b7c721e718c6323117ae4521cded7
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076648f40281---7471663642.pdf In PDF document text
    • http://tomlitkom.ru/ckfinder/userfiles/files/xuporiwowuxexa.pdfIn PDF document text
    • https://rumputhijau.com/contents/files/dopezojos.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/50911357593.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e8f79c1da---vabozazazovefopowo.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/59060485885.pdfIn PDF document text
    • http://neoneofitou.com/ckfinder/userfiles/files/zijowanelixoranabepogined.pdfIn PDF document text
    • http://asid.rw/userfiles/file/70364009470.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608037deeecbc---60350346743.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/44e53223b21617c127f592451c279967/gibudonimubaguretibi.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/78142895486.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/ad10654f1f5a30de3459e3295723d1f9/wigajawaveta.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/79042051024.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/t6nhmi5n04o3kkp0h8275gg9s4/27205982471.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c148627ad50---47535060477.pdfIn PDF document text
    • https://aptitudeclass.com/ckfinder/userfiles/files/zatiba.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868b214a3c7---povupedunuv.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/23607719313.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/97iiktkpn6ns64ivu3aj6jdgb1/31572735841.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/48861421616.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/d45b6c7621c6774bffd3634789156029/8846391885.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=prolog+list+examples+pdfPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B4 10840 bytes
SHA-256: b4bbf572b56d1e34ab88add083c497b722e028a11f905f90f991c7538f2dac71
font_01_sfnt_off0000ec93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000104a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A5 17936 bytes
SHA-256: 1de161c937f01c4448289eb1896446c873d8e1624e64437e48939ffac68b5937

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