Malicious PDF — malware analysis report

Static analysis result for SHA-256 9007b303dd42f8ab…

MALICIOUS

PDF

51.4 KB Created: 2021-09-03 10:53:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 026f9cb9eafb8915493b15445e0b6069 SHA-1: a3ae943fb53ed56e23276fc5f75fcae4433693c8 SHA-256: 9007b303dd42f8ab821b44a3c0eb4d687c601ba6dfab841de0559f9b5b890b3b
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size, image-heavy content, and embedded links. The numerous external URLs, many hosted on compromised or disposable domains, suggest an attempt to redirect the user to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9337

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 51 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://laborke.ru/uplcv?utm_term=3+phase+motor+control+wiring+diagram+pdf PDF link annotation
    • http://olsztyntransportmedyczny.pl/userfiles/file/20532149235.pdfIn PDF document text
    • http://studioriboldi.eu/userfiles/files/33922373310.pdfIn PDF document text
    • http://pvhs1980reunion.com/clients/e/e5/e5e9f74eb83211af097e98bf68d59c4c/File/79017539154.pdfIn PDF document text
    • https://jasz-pap.hu/UserFiles/file/nexag.pdfIn PDF document text
    • https://kientrucqhouse.com/uploads/image/files/35565648072.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/2d100e3838f321473cda3eb7944d1040/fivadizinibepageded.pdfIn PDF document text
    • http://mousike.it/img_ins/files/60630708377.pdfIn PDF document text
    • http://tate79.com/clients/868750/File/meromesonegedumoguwu.pdfIn PDF document text
    • http://greentreeprep.com/cote_dor_import/admin/ckfinder/userfiles/files/lazaluzerokomexadi.pdfIn PDF document text
    • http://benly-carson.com/product/files/dogiwazilexexula.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/likatunidumolipigu.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/3da59025601753a3864aea27758f934c/ximag.pdfIn PDF document text
    • http://overtonnation.com/clients/f/f9/f97855507a39dfa58978186db9bff07a/File/22558491915.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/sugerurunewiwotisubura.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1811d7f1ca---jeripivixogebipu.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/osc536gpkp3gvg1njh24in0u95/7492401252.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609895d829d45---perevovixojitijodap.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/wudutudunerulewexiresev.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/2on1mo05k91bmfkhbnd9tprq4d/nijafatamiberumifunipoguf.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/m1ctio3738gggiqk3caiiskv32/34960848237.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607260f17092b---68356033171.pdfIn PDF document text
    • http://taihegas.com/filespath/files/20210831080526.pdfIn PDF document text
    • 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_off0000b503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB503 11228 bytes
SHA-256: ef4fc4f7368a5b5eba074508c4476e3d3e7f30b03a29a6b5aad7a442a3d8cdea

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