Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a628a235ef66df1…

MALICIOUS

PDF

79.2 KB Created: 2021-03-06 03:25:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2a79be38eae31e61cebedba3e9420582 SHA-1: 6e4e952c5ff2b52ba5306a910649b15e3780fed9 SHA-256: 9a628a235ef66df18cbe1af115da85433aa4c424933ee9daa71f4cbda44bd018
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm used for distributing malicious content or phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware delivery mechanism.

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://pelibifir.ru/award?keyword=how+to+fix+insinkerator+disposal PDF link annotation
    • http://thelandofbadideas.com/najejebegekutazoxanumuranv024.pdfIn PDF document text
    • http://tricitysikhs.com/83177932188nxvcp.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/gdhaGhf/2065538236.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/fukomudokozefexinivunibuj.pdfIn PDF document text
    • http://smartbright.club/swot_analysis_exampletcn64.pdfIn PDF document text
    • http://carishr.com/how_does_cultural_diffusion_online_worke1w73.pdfIn PDF document text
    • http://kipokefurur.mygamesonline.org/bhagavad_gita_chapter_2_summary_iskcon.pdfIn PDF document text
    • http://idealica-italiaofficial.site/showbox_apk_mirror_latest_versionwi12k.pdfIn PDF document text
    • http://podifodosej.scienceontheweb.net/how_much_are_teslas_model_3.pdfIn PDF document text
    • http://sudilufib.getenjoyment.net/fufaronegon.pdfIn PDF document text
    • https://cdn.sqhk.co/vobipibomuk/hige8hf/nebraska_furniture_design_gallery.pdfIn PDF document text
    • http://itwow.info/fallout_4_deathclaw_companion_mod_xbox_onenahgo.pdfIn PDF document text
    • http://5coupon.info/what_does_it_mean_to_fall_down_the_rabbit_hole9f2p7.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/xRiihaj/redonabejuv.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/82f64226-cc44-441d-8fdb-13b659de79ac/explain_the_three_principal_types_of_business_activity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2c2fd5d-9b1f-4b1f-9ee7-a598cf90b4ac/is_boston_market_food_healthy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afe3b05c-fa40-44fd-8f01-a8c8d9a3547a/fundamental_theorem_of_calculus_part_1_calculator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95c58658-44cc-4054-91cd-23961d32548e/51997478517.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1a05fcd-00f3-4761-8a46-dc53fe7683d5/womewibebatex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b5ebd25-8f2e-410c-8842-7f6c25739efa/way_of_the_world_summary_act_wise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a977e747-3501-4d09-af85-97ac5ed4adf8/maxugoxogavekolidolex.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_off0000f6c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C9 5220 bytes
SHA-256: 9c4646040805757f069b678f591826f5ddf81b8c3513a36192c99671299f1b1f
font_01_sfnt_off000108b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B5 11428 bytes
SHA-256: a31cee1694f76fd5504a5c83ca3137499039c8602cde7d88538b18e1afc97b88

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