Malicious PDF — malware analysis report

Static analysis result for SHA-256 a44696b481bf177d…

MALICIOUS

PDF

81.1 KB Created: 2021-03-19 04:26:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a5251bd5f415b8c7af282d05e41475f8 SHA-1: 5b00d17f3a84ca5ea9c3b60fddc95c3e94c98b67 SHA-256: a44696b481bf177d8c2f6b073177d96de724298d0f4f6a02796021ec443989e3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

Heuristics 5

  • 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
  • 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://mezovuduw.ru/wix?keyword=hanimex+sekonic+light+meter+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380223/normal_601a4c1b2760f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365560/normal_5fcd52c1bd859.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/46731586770kj1ox.pdfIn PDF document text
    • http://airned.ru/90622881758z5xsl.pdfIn PDF document text
    • https://xukunuwemixul.weebly.com/uploads/1/3/1/3/131384589/tukokig.pdfIn PDF document text
    • https://pekiwuvigefarov.weebly.com/uploads/1/3/4/7/134766825/06db1b3d6ff1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494417/normal_5fff0654dae0e.pdfIn PDF document text
    • http://klossheff.xyz/keredixikiboay0c3.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/mewemovawu-rijuravovenaj-danopumasuwi-wepevipekunili.pdfIn PDF document text
    • https://tusululobiwivet.weebly.com/uploads/1/3/1/1/131163859/5947711.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476580/normal_605216b560e8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474450/normal_6008aba98c649.pdfIn PDF document text
    • https://kufoxigokutef.weebly.com/uploads/1/3/1/8/131856815/7014753.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366011/normal_5fc8fa41660c4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d532d705-f9dd-4fef-a2d8-acab6fc29cac/flowers_for_algernon_audiobook_progress_report_1.pdfIn PDF document text
    • http://lezevefujo.rf.gd/71048335046.pdfIn PDF document text
    • http://jewomegoka.epizy.com/61924013145.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b45459a0-ae3c-44c3-a783-7bd21784f3fb/what_is_the_focus_of_the_contemporary_psychoanalytic_perspective.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88bf3e5d-8b9a-403e-96ce-2d5fa94caa20/list_examples_of_object_oriented_database_management_system.pdfIn PDF document text
    • http://bepafazo.epizy.com/what_is_a_good_thesis_statement_example.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDA 5188 bytes
SHA-256: e3c9bfb9405547b29060eac6e47103050a0a4d0f417b4d802421be500070f46d
font_01_sfnt_off00010052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10052 12144 bytes
SHA-256: b4915da1a800ded8f20ef8d5463aee111e4f026d8ce2e8a0404009174f22056f
font_02_sfnt_off000128f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F0 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361