Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c02d3957a74c7e…

MALICIOUS

PDF

89.3 KB Created: 2021-06-27 02:40:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 77a46e02c802bacfc37ca2eda58c5973 SHA-1: ac1ff421b502ccce0ecd26524ee798583434aab8 SHA-256: 06c02d3957a74c7eac53d4ce0400ad8748b327bc7989700b2b0c86161265fae0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate maliciousness, classifying it as a phishing trojan. The primary function appears to be redirecting users to potentially malicious content through a link farm, likely as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf242264a6---93754271267.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b671d268078---zuvumelobarekekorik.pdf
    • http://cherryontop.pl/upload/fotki/file/putizosifopejagomila.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606d47bd3ee95---vopasomobudebutominurug.pdf
    • https://agatanorek.com/files/file/35841182017.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16071cd0ca63f9---21351558336.pdf
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/ebe7369ef65ff4d8f96db5d606913fa6/talowefasimagozirivetisof.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/2b055c63a30bc14f00338f0f721ab576/94208663126.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/0f2a6d6f0115bb6d029e16763e9562ec/37556784210.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd796def55---bumuzazulijegepuzapul.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e75e27cbd---jixoripuzaletumozu.pdf
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/j8gpf8skp3pmngfjadpsr45qfa/zoxokuxen.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/34b76de34b47e588284910bf4d99756a/gijodudu.pdf
    • https://soechi.com/userfiles/file/60529154779.pdf
    • http://stacjaregeneracja.pl/userfiles/file/safaribugetozifapok.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/c898a743badc79ebf85d48e34554b543/senizipusumomikozasijeris.pdf
    • http://vmkmsz.hu/userfiles/file/44393091110.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6b9b6bf83---56877217404.pdf
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16083cca5ceead---98078974924.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16080eaf55a374---72464282496.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7051ac958---78797145677.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=sample+question+for+job+interview+and+answers
    • 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_off0000fa68.bin
a1ffff311c0b3e3ee02c48bbcc3e4a9589b105882a0ac9d6116af8db2aae0820
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA68 11404 bytes
font_01_sfnt_off000114d2.bin
10d43789b160555583bd501d262253fc3cc223f7e244dbc02309e7b9bc41882d
pdf-font-stream PDF embedded font (sfnt) at offset 0x114D2 16568 bytes
font_02_sfnt_off00013f8c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F8C 16792 bytes