Malicious PDF — malware analysis report

Static analysis result for SHA-256 286e428e91e9f0f6…

MALICIOUS

PDF

80.5 KB Created: 2021-03-13 20:02:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 07677fbe926d44529fd36880bb47f40f SHA-1: 98dcd1e9891a1c2aeb9b23f4f20bb6ce70a75659 SHA-256: 286e428e91e9f0f6c8dbb323a7f63c58a087beb80d521f882eb332a40bfe53da
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 0.9995

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://bologen.ru/strik?utm_term=how+much+does+it+cost+to+replace+septic+tank+and+leach+field PDF link annotation
    • http://feedbacrnz.space/internet_manager_keygen_generatorsrc2w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476152/normal_5ffea4a46be09.pdfIn PDF document text
    • http://bizarur.iblogger.org/63418374535.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/nakaxidera.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/berenberg_capital_markets_analyst_salary.pdfIn PDF document text
    • http://rimisirotox.iblogger.org/wutijawikojuxawafof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479906/normal_602421433bd83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390328/normal_603561d0dbb46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473064/normal_5fe92d876e7d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379837/normal_5fd7614559b4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379046/normal_5fe34933097d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372982/normal_6002a80be5d73.pdfIn PDF document text
    • http://nomenowunesazoz.scienceontheweb.net/18149433138.pdfIn PDF document text
    • http://springtea.space/proper_way_to_wear_face_mask_pleats_up_or_downnhw5s.pdfIn PDF document text
    • http://greatmasters.biz/tamil_font_design_online_freept4oq.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/1abe45a8-94ff-41d3-a26b-2487a1dcf342/lugadojetarovosami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d011a0be-336d-46aa-a5d2-cf76d2dfa580/honda_generator_parts_for_sale_near_me.pdfIn PDF document text
    • http://soxomidil.epizy.com/rebexabonabezuluxalo.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/how_to_get_phthalo_green.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b47036c3-1ce6-40d1-998d-abb4819b5b8a/scott_pilgrim_vs_the_world_netflix_nederland.pdfIn PDF document text
    • http://munakazoxan.epizy.com/liftmaster_8500_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f929685-2380-4d65-8b61-5b737c43d428/92633077177.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_off0000edc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC5 5392 bytes
SHA-256: de0a80fed0235d18d2086ca59956fe598ed55f28f6fd95f37671491331f54034
font_01_sfnt_off0000ffff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFF 11300 bytes
SHA-256: bf486dcfb9a55c8c09498d6714bbca5a70ca1046458424fc04e9dbd1b185e692
font_02_sfnt_off000125fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125FC 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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