Malicious PDF — malware analysis report

Static analysis result for SHA-256 81d9e6705288194e…

MALICIOUS

PDF

117.0 KB Created: 2021-03-17 03:46:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 96484683accfaf1a81b9987b035d4bec SHA-1: a0a48d0559f6ee0ac46c841ab3ad36a8fcc58403 SHA-256: 81d9e6705288194e078a65a982fa9e6a8b3ad7f343674e964f48cf0e550a7614
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, with at least one pointing to a disposable domain ('lozipotod.ru') and employing UTM parameters, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains keywords related to stock performance, likely as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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 https://lozipotod.ru/123?utm_term=church+and+dwight+stock+performance PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4380700/normal_5fcfefebf1b36.pdfIn PDF document text
    • http://detaxinema.22web.org/lajifubukefe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420586/normal_6047b2ffbe54a.pdfIn PDF document text
    • https://bolukuja.weebly.com/uploads/1/3/0/7/130739437/wedek.pdfIn PDF document text
    • http://xepivutede.22web.org/gapawilo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372378/normal_60046a50cd452.pdfIn PDF document text
    • https://cdn.sqhk.co/motuvitewodi/hVjchaj/best_racing_simulator_games_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/safubuguva/cCH0hdX/32370674634.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374196/normal_604ddbf665102.pdfIn PDF document text
    • https://gegotebure.weebly.com/uploads/1/3/1/6/131606057/0e468c5b05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387704/normal_603a19c18630e.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/Wicjdjj/musicland_hotel_palm_springs_phone_number.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459787/normal_5ffb13bd9168c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369648/normal_601b307019c04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454277/normal_5fd6f00b70bc0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfbd46e9-c5fb-4056-98a7-024d95855698/93091144811.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92b9a843-6c11-4ba6-bd3c-cf90374a54c8/lidemiroxenum.pdfIn PDF document text
    • http://xosatog.epizy.com/nosajutudurifisowotutagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70b1a28a-c8a5-4181-b2b7-a593c46a0671/setokabugativedokoj.pdfIn PDF document text
    • http://tovetetuw.rf.gd/debevupuxor.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000187ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187FF 5596 bytes
SHA-256: 76d3b18388decf0c62d7eda42e722202fa6d2ad2e3223c539864b4a8b6c9cb4a
font_01_sfnt_off00019af8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19AF8 13376 bytes
SHA-256: 0aa5d76bdbeb708004ea96c538635b67a1abb97294af79b2c098464937de00d7

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