Malicious PDF — malware analysis report

Static analysis result for SHA-256 a569120e8a9e47da…

MALICIOUS

PDF

77.2 KB Created: 2021-03-06 13:30:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e3ec379d5c4130152f7e9390dee1d7d9 SHA-1: be3b294d2cc1d4795bfb75c7b23e540d03e4af1f SHA-256: a569120e8a9e47dac891bb1bfc3c055659fb9d5b52333af30b9ad58e36a05bd5
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 0.9993

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://vilenefex.ru/strik?utm_term=subway+surfers+hack+download+for+pc+windows+10 PDF link annotation
    • http://somixewavado.sportsontheweb.net/50009697081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376358/normal_5fdc5f91dfa0d.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/89033694522.pdfIn PDF document text
    • http://bujasap.iblogger.org/68207636148.pdfIn PDF document text
    • http://tinesemexogo.mygamesonline.org/masterbuilt_30_inch_electric_smoker_lowes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416154/normal_600bb83d7142b.pdfIn PDF document text
    • http://wuroguredogir.getenjoyment.net/majebafepopivez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496153/normal_6029d5345ee59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369932/normal_604348879b9cb.pdfIn PDF document text
    • http://fisitupogavi.mypressonline.com/harley_davidson_service_manuals_for_sale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457563/normal_603f845b89d8c.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/6014ad91-0828-47b8-bbf8-0a662428990e/how_to_pledge_delta_sigma_theta_online.pdfIn PDF document text
    • http://rojaxenutu.rf.gd/android_10_release_date_huawei_p20.pdfIn PDF document text
    • http://biduxejuvelofe.rf.gd/lanebik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf1b75cb-38e2-497c-99d4-38b0169c0b22/vojowemeziku.pdfIn PDF document text
    • http://lopogoroje.rf.gd/pedomolenepogadepiveduba.pdfIn PDF document text
    • https://933527c5-e005-4225-a3aa-05fee46c7696.filesusr.com/ugd/b51dd5_a411fe0b8d5e4c268edd2e1af447575a.pdf?index=trueIn PDF document text
    • https://77bac38d-831a-46d6-8f22-d7743fcadc58.filesusr.com/ugd/5b9a87_a0ba24cc710f43c1a539b91a66be36b3.pdf?index=trueIn PDF document text
    • http://kopuperoki.epizy.com/samsung_rf268abrs_ice_maker_removal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bcec4e4-12e4-4ae0-a279-c76579cd3f68/nirazusesat.pdfIn PDF document text
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_e23b39f34baf436381a2e698343d75ac.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8229a669-ef36-4364-8a1a-62431d62460c/monster_hunter_2020_milla_jovovich_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9258f4b-9f43-49a0-9842-14f80107b39c/which_of_these_is_a_minimum_cash_account_balance_that_is_required_by_a_bank_quizlet.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_off0000ef10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF10 5936 bytes
SHA-256: c3e557260991e909b5ba5279a3cdd6276afaa505d4f9e3f3b3c767513273c83f
font_01_sfnt_off0001035a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035A 10580 bytes
SHA-256: 2ad514c993202093ceb8f17021ed33b2088f62f6d7112fd8267a8ce3c18f3787

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