Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec15020a66eea2d4…

MALICIOUS

PDF

76.8 KB Created: 2021-04-01 04:40:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 100c118ac848da68e8007e91d5de1bf3 SHA-1: 529f8379a2a3e1a82aea67b7fce95b8d98ad42dc SHA-256: ec15020a66eea2d423c86eb00635efed6e7c2ecb5332f68e76561c1009cb3c7a
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL leading to a domain associated with phishing and spam. The document body, though partially corrupted, suggests a lure related to Excel, likely to trick users into visiting the malicious URL.

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://baarspo.ru/strik?utm_term=what+is+a+carriage+return+in+excel PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379987/normal_6064d36430f3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493881/normal_6012624414033.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407306/normal_5fc9156ecd6c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489844/normal_5fce24241f1b5.pdfIn PDF document text
    • https://javezevefumutew.weebly.com/uploads/1/3/2/7/132740470/92b19b2834.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496818/normal_5ff48e82ba24a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449392/normal_6001cf30615c8.pdfIn PDF document text
    • http://freud.icu/guzibaruxirunvs.pdfIn PDF document text
    • http://datingsexchat.site/45898384961ewbrv.pdfIn PDF document text
    • http://opssmall.space/zudigomato97pf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416789/normal_6020b96586a5f.pdfIn PDF document text
    • https://filinisosiwox.weebly.com/uploads/1/3/0/8/130814007/9127019.pdfIn PDF document text
    • http://petersikdar.com/309560317410tw81.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/29287f2f-233a-448a-8c2b-be46ce9a2a6f/do_tattoos_fade_away.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/nokewujataki.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/59860270477.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/human_development_report_2015_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a231fb9a-3e1d-4357-8b36-94b80a862c33/blue_is_the_warmest_color_watch_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/205078fe-b608-46db-afaf-5d9322b1d074/mucusless_diet_healing_system_spira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be8d546e-3345-4153-ab48-a26f7783a01f/voloxozujebaxanisagonug.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_off0000edcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCD 5144 bytes
SHA-256: ccc69f6e0fbc28e5966b29db8da06dff377b0617c4e75e3c25f389d6ef821ce0
font_01_sfnt_off0000ff59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF59 10684 bytes
SHA-256: 01938c9e8765d76697f021eadc1ca98d6e5cd867ee8ee84fb8ec600308294deb

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