Malicious PDF — malware analysis report

Static analysis result for SHA-256 64ec7b671c7abc5b…

MALICIOUS

PDF

72.4 KB Created: 2021-08-17 05:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: bedc85c87a211485a37c673dba5a025c SHA-1: 37712b8aa7517bd0a3ef0f58e1f6710e8ac74558 SHA-256: 64ec7b671c7abc5b4581f0af2647fc04185a504ec9517cf0f97944a493315a37
194 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML models and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to numerous disposable domains, likely intended to host and distribute further malicious payloads. The presence of 'cmd' in the document text suggests an attempt to execute commands, potentially to download and run additional malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6611

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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
  • 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://synerhu.ru/uplcv?utm_term=the+last+unicorn+download PDF link annotation
    • http://bainihu.com/upfiles/editor/files/jovojawipumipokaroteli.pdfIn PDF document text
    • http://sztarmedia.hu/_user/file/99488953914.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/98671608977.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/6629fcb556d17040e7420adde039f313/51662512177.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/6k7sjpd7b7tl40rub0h4ngocmd/56405122035.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc87512dd90---zaninofoga.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/boximifus.pdfIn macro / runtime command snippet
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160782f6b8c003---70526936292.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607aecf2a72f2---47699349258.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ee7f1427822---migopoke.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871c42b0029---kinavafip.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c47ca5916---98637166635.pdfIn PDF document text
    • http://asustainable.com/global/file/75644312882.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/mugaratalakegosi.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/2nlfpjlr3kget13pneerfho6d6/kasev.pdfIn PDF document text
    • https://xistenze.com/files/files/desuxov.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/buzubivemulexogabo.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/zanulodavezewo.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/volor.pdfIn PDF document text
    • https://tdfstore.it/file/44324388275.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/3e0da03e9d6e014861e41d343df61574/6921765311.pdfIn PDF document text
    • https://sealskinz.ru/files/file/wasube.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/83529635290.pdfIn PDF document text
    • http://www.minaakshimajumdar.com/fckimages/file/14958298442.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plIn macro / runtime command snippet
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FC 17360 bytes
SHA-256: e667f88395b9197297cf9c1df29815eebbab96663369040c345179d3f65b0122