Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5b73f3ac7a74440…

MALICIOUS

PDF

73.0 KB Created: 2021-04-07 16:13:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5c6f22b6c4fbd200e27c5bb2c6648856 SHA-1: ebbea5ebebb331e4ead9fb9360a96c72c157c155 SHA-256: b5b73f3ac7a74440326e3214756b8bf5af82bae37363110b875abfaee17f081f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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/wix?keyword=the+chemistry+of+life+answers PDF link annotation
    • https://cdn.sqhk.co/xasurila/fieZjXw/wehrmacht_vs_ss_movie.pdfIn PDF document text
    • http://jabodaligononu.iblogger.org/44575303180.pdfIn PDF document text
    • http://1gusevshop.space/all_ticket_to_ride_games_rankeda1fut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386822/normal_6019f3cb274f7.pdfIn PDF document text
    • http://wanulutipumik.iblogger.org/rrb_alp_answer_key_31_aug_2018.pdfIn PDF document text
    • http://jozulizip.iblogger.org/xobelunabepafawonajenel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462344/normal_60641c88a00b6.pdfIn PDF document text
    • https://cdn.sqhk.co/sumavevop/6gljh4n/panda_toys_for_babies.pdfIn PDF document text
    • http://raffle.website/15703723152u3p2m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_601e59e07bcb7.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/504fa726-1409-4b52-bb98-e2e309507bf3/motowiertarka_bosch_pbh_2100_re_cena.pdfIn PDF document text
    • http://rovuwuruw.epizy.com/simple_css_button_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/800d47c8-d284-4af7-97a7-f23f2738c819/elements_of_design_definition_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8450b832-06e7-48f6-8f32-d4d5c553f8ee/skyrim_special_edition_latest_update_2020.pdfIn PDF document text
    • http://fefeseriwumasu.rf.gd/validity_in_research_examples.pdfIn PDF document text
    • http://vumafovixono.rf.gd/what_is_the_collaborative_problem_solving_model.pdfIn PDF document text
    • http://kolijava.rf.gd/gawubepulitosugaruwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e5f952c-2af8-469a-977a-247644d82e5f/85659199904.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_off0000d4af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AF 5052 bytes
SHA-256: 3ebe9543b972730b2d84dfa6a063570d8fdbe817d95a3e019e9153ab01e5e04d
font_01_sfnt_off0000e5be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BE 10144 bytes
SHA-256: 0fc412855854adacb10777ef07e5cdc74a3d64c70c5cf3970cccabb3632db568
font_02_sfnt_off00010882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10882 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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