Malicious PDF — malware analysis report

Static analysis result for SHA-256 35c763bdbe07601f…

MALICIOUS

PDF

55.0 KB Created: 2021-09-16 07:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ba711dbe23566da1ee639c70eb31c090 SHA-1: cf0c3a209bd810f7bd0528867aebec2ba36a5fa5 SHA-256: 35c763bdbe07601f4ddfc8e97efcc3d1da45755d4aca84f98c9cde2de972ad8c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests the document is designed to host numerous links on disposable domains, likely to facilitate phishing or malware distribution. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or credential harvesting attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9081

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://canevastoilestjean.com/upload/editor/file/57975746413.pdf In PDF document text
    • https://spandoekland.nl/userfiles/file/93656718194.pdfIn PDF document text
    • http://casadiriposomarsala.it/userfiles/files/winevidewifudipufomisore.pdfIn PDF document text
    • http://bjavc.com/filespath/files/20210909230639.pdfIn PDF document text
    • http://midel.me/userfiles/file/84994924670.pdfIn PDF document text
    • http://www.somdattabasu.com/fckimages/file/liruzerirurira.pdfIn PDF document text
    • http://eros-arena.de/eros/userfiles/file/79981369781.pdfIn PDF document text
    • http://em-mould.com/ckfinder/userfiles/files/33998611664.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/wosisakefifavapetuzalo.pdfIn PDF document text
    • https://investkwik.com/userfiles/file/11371540356.pdfIn PDF document text
    • https://abss.pt/userfiles/file/39018689706.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/81100556171.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb33c5c3c3---safufigajewuxisikoxagifi.pdfIn PDF document text
    • http://duet-czluchow.pl/userfiles/file/tigujizopapawufisizif.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/55981962610.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16131914f0e7ac---tixirazokolavulobikafa.pdfIn PDF document text
    • https://guclupin.com/calisma2/files/uploads/97952126977.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/kebilafumusekutim.pdfIn PDF document text
    • http://geoman.cz/data/file/nowozenetivunol.pdfIn PDF document text
    • http://twilaw.com/files/files/xolidaxorodasijiwosezafa.pdfIn PDF document text
    • https://tsydesign.com/userfiles/jws/files/zitotataf.pdfIn PDF document text
    • https://sandp-engineering.com/ckfinder/userfiles/files/7958181094.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=unfollowers+mod+apkPDF link annotation
    • 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_off0000b41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB41B 15944 bytes
SHA-256: 5ea77094ff2a5c1897e2a54cbaabe246a498d900fadf6a2203ffee59e3ce8ed4

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