Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e32ac0482765142…

MALICIOUS

PDF

86.2 KB Created: 2021-07-18 23:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 1bbd0c932ad05bdf3c7d3129f8438e70 SHA-1: d72a55a637ae655e175faef735cd39996bb9e5c9 SHA-256: 2e32ac0482765142bb1a7f304d334da9237aad6b100cd5fff4d014dbeed71553
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier, indicating malicious intent. It functions as a link farm, directing users to numerous external URLs, some of which are hosted on compromised WordPress sites. The presence of multiple external links and the detection by security tools suggest this file is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://eugensa.lt/app/webroot/uploads/userfiles/files/45713427851.pdf In PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/781179ea004807d408efcfe3301cb497/junumuv.pdfIn PDF document text
    • https://kermiradiatoriai.lt/images/files/puziganiwilar.pdfIn PDF document text
    • https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/tobuditetedemuka.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/98ec001b4391d7f5eea41ba84a2cab96/potilewiwobiragak.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb0911ab79---bopujenipunuvuvuga.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/91417721437.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab17a1395b---49578523180.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/h7baie5gn1boh1l9uoika71fsk/15161662413.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/uv27fc1g7nl46v6iqr953ua4c2/6326592161.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08055b6996---sepiw.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091e494d4b4c---38146108491.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160b957c1ad6ef---49091508545.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9005899f2---xutavizeteritizep.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/59907150597.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081273359bff---17518145777.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/tabajibirutakos.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/24932504359.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609d224785528---tabikoxofesusesebusige.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/3bae84a162f005a3f0729c4386e7fc1f/86581728292.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/9489965447.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8ba433269---monawivexajomamutomepejal.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160999f713d7a2---17220325258.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/kitivibag.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/vilivolo.pdfIn PDF document text
    • http://nenorm.com/files/files/jopezaxuzi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=lotto+results+26+august+2020PDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001052f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052F 17752 bytes
SHA-256: b28a28f1d9faf6fa9970f0cb740a7195cafe749ea7da51abbc9b242f60289984
font_02_sfnt_off00013331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13331 10552 bytes
SHA-256: 6c1b335665bf3d909ce83eb29378eefa77b7e0c25f23fe11ac96ed28f033bd96