Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed2962e41fcdead…

MALICIOUS

PDF

70.6 KB Created: 2021-06-08 01:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8c2d62cbd7f1b438f91f403b798fd2e2 SHA-1: 6ee3dc5206c31a08082feebea17f22a8db1bd534 SHA-256: 0ed2962e41fcdead0d8efed23e527e08353fcad98e20f9fa00fd9f97da0c2d15
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cructi.ru/pbw?utm_term=complex+ptsd+from+surviving+to+thriving+quotes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481409/normal_600af3ad4f95e.pdfIn PDF document text
    • https://jolidezebixisu.weebly.com/uploads/1/3/3/9/133997790/2724312.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/e26acf976435e1.pdfIn PDF document text
    • https://nugekowu.weebly.com/uploads/1/3/4/5/134587082/c03ad37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477408/normal_605a2eb5251fc.pdfIn PDF document text
    • https://nasolebad.weebly.com/uploads/1/3/4/6/134695036/zerofuviter_mamekodor.pdfIn PDF document text
    • https://debirare.weebly.com/uploads/1/3/4/3/134372852/xivomalekadijevora.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415304/normal_6032ad81b4864.pdfIn PDF document text
    • https://nobasaxekomu.weebly.com/uploads/1/3/5/3/135322761/vuvowuxunorame-piwijitulevopot.pdfIn PDF document text
    • https://putesoborufo.weebly.com/uploads/1/3/0/8/130814126/3842747.pdfIn PDF document text
    • https://dapinolun.weebly.com/uploads/1/3/4/7/134762022/e32b6120d.pdfIn PDF document text
    • https://radunepik.weebly.com/uploads/1/3/4/6/134617153/217320.pdfIn PDF document text
    • https://papokekes.weebly.com/uploads/1/3/4/5/134599002/96ffa57612.pdfIn PDF document text
    • https://zafapajesat.weebly.com/uploads/1/3/0/7/130740498/7609573.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464700/normal_60331d6c2ad2c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://laxaxufudej.pbworks.com/f/how_to_get_canva_pro_for_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c8cadd0-fc98-4cf4-975f-b693e85ad620/how_do_you_take_apart_a_pack_and_play.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef5640d3-26dd-4128-9835-ac1174f4bde8/who_makes_the_best_sewing_patterns.pdfIn PDF document text
    • http://fevuxowina.pbworks.com/w/file/fetch/144677211/deziwinepitoja.pdfIn PDF document text
    • http://degenazi.pbworks.com/w/file/fetch/144456435/frontline_commando_d_day_old_version_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85531614-428a-4667-b2e1-6df68dab7ff4/71182570818.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9c181ce-ebb1-46e9-a50a-938146e8db1b/jewowojuzuzokugugivisodap.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_off0000d41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41B 5404 bytes
SHA-256: 1d434d400a23f0ab4e7e77949ea692f681d75d4121245125bae226ab703cef86
font_01_sfnt_off0000e652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE652 10804 bytes
SHA-256: 8b6d141b001d0d75d8f9270ac924a4c848cc462fa9b6ef3b658f93e1fa3e56d7