Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f76430ff3cc93c0…

MALICIOUS

PDF

81.7 KB Created: 2021-03-20 18:24:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 339ca4997ed81b0ab49b4afe455c045b SHA-1: 69c51f1f38f4ce0c2c566076d340360080fb92d2 SHA-256: 6f76430ff3cc93c03ce7eb668e8afe3304ca586078e7a490ca61f5eccdca60b2
146 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The 'SE_CALLBACK_LURE' heuristic suggests the document is designed to trick users into calling a phone number, a common tactic for tech support scams or phishing. While no scripts were extracted, the presence of numerous external URLs, many on disposable hosting, points to a link farm or phishing infrastructure. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://dugedepap.ru/wix?keyword=fixing+the+articles+of+confederation+worksheet PDF link annotation
    • http://tonerinkstore.com/yaesu_ft_450_specs1du0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381997/normal_5fcbb03f12e81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458838/normal_5fd61a19480df.pdfIn PDF document text
    • http://jenuxijaf.mygamesonline.org/right_and_left_rudolph_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393220/normal_6014bbdcc3a6e.pdfIn PDF document text
    • http://jewogipuwivi.medianewsonline.com/14294813081.pdfIn PDF document text
    • http://begetus11ppz.xyz/25411595452k6pky.pdfIn PDF document text
    • http://mivegik.mygamesonline.org/pevilok.pdfIn PDF document text
    • http://axecheat1.xyz/50113024803pp8p.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/vabijizijonolekimus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446174/normal_601b0fb5ebcd4.pdfIn PDF document text
    • http://koponegigat.medianewsonline.com/how_long_should_i_charge_airsoft_battery.pdfIn PDF document text
    • http://wosovaki.iblogger.org/3910551602.pdfIn PDF document text
    • http://mekujoviwe.mypressonline.com/how_to_pair_plantronics_bluetooth_with_iphone_7.pdfIn PDF document text
    • http://tajawuxelefa.22web.org/92757081347.pdfIn PDF document text
    • http://fukiwurezopukof.mywebcommunity.org/tiketimeradedaxanezevi.pdfIn PDF document text
    • http://lufexaxoxak.mygamesonline.org/90136011557.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459629/normal_6051719a42c92.pdfIn PDF document text
    • http://katermore.ru/craftsman_electronic_radial_arm_saw_partse8ug7.pdfIn PDF document text
    • http://fidekeleko.medianewsonline.com/how_to_pray_for_a_good_future_husband.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://abaaaae4-9231-44fc-b12c-ad55ebcc68e7.filesusr.com/ugd/2ca09c_4871d4c7d4ea4dadb3a805bdac67f1e9.pdf?index=trueIn PDF document text
    • http://karifopiti.epizy.com/52588559498.pdfIn PDF document text
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_1bf6b2391cf2401ba818b042db395511.pdf?index=trueIn PDF document text
    • https://36d3fe4d-ce77-4ecd-ae21-04b42370c250.filesusr.com/ugd/871c54_6e1f085548ec4eb2b1e196454967e4a9.pdf?index=trueIn PDF document text
    • https://ad858f6a-7bbb-416d-9365-e04d7986ed9b.filesusr.com/ugd/3c9ac1_a5762fb6654a4d808a53646499143fff.pdf?index=trueIn PDF document text
    • https://badbb018-ab4e-499b-b788-960949b82e3d.filesusr.com/ugd/4f4c56_6c62ca2b8fd14737bd72b8ce7105907d.pdf?index=trueIn PDF document text
    • http://xupuwineris.epizy.com/bridesmaids_speech_template.pdfIn PDF document text
    • http://zejeganemumejow.rf.gd/vidyasiri_scholarship_2019_application_form_apply_online.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_off00010119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10119 5464 bytes
SHA-256: 52745d6351415f7135e970236bbefba4978949a05cf7768ee1901236f2ee683b
font_01_sfnt_off000113c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C7 10936 bytes
SHA-256: b67989f497faa85818fca8d69253b5650c356dc575234eb7ca077fcfeeeac2e0

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