Malicious PDF — malware analysis report

Static analysis result for SHA-256 13bf5fbbb1466136…

MALICIOUS

PDF

80.4 KB Created: 2021-02-10 04:17:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f309b6ff249595c9e672205c6cd86f26 SHA-1: 055488694ef7384d5c21c32075aa14ef94379b40 SHA-256: 13bf5fbbb1466136716fba61d441718e5143d1742bc63b578b422b69ef78ef71
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'SE_CALLBACK_LURE' strongly suggests a callback phishing or tech-support scam, where the document likely prompts the user to call a phone number. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to trick users into initiating contact, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/123?utm_term=mgm+logos+fandom PDF link annotation
    • https://cdn.sqhk.co/vekuzajomugi/nSjejh5/total_hockey_games_in_a_season.pdfIn PDF document text
    • https://cdn.sqhk.co/jasamomedam/hi0o2hg/castle_crashers_remastered_xbox_one_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/hciajhm/amazon_fire_tv_cube_review_2018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393022/normal_5fe88f03562bf.pdfIn PDF document text
    • http://shimano-stradic.ru/tibogegobiicuz5.pdfIn PDF document text
    • https://cdn.sqhk.co/xipovowimugo/5gh6hcB/free_fire_wallpaper_for_laptop.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvidomanale/jjXZChr/xedejetuvosoxidevifuwo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499351/normal_5fce993dc1221.pdfIn PDF document text
    • https://cdn.sqhk.co/texafikogot/Fhha1n5/90406255889.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413373/normal_6011d5dc3f505.pdfIn PDF document text
    • https://cdn.sqhk.co/rojozedofaf/hnOjglP/risomotolalokiwuvapojow.pdfIn PDF document text
    • http://hookup154.fun/devujosesaso2wt2e.pdfIn PDF document text
    • http://prognoz-football.club/fishing_diary_mod_apk_2018v4kn6.pdfIn PDF document text
    • http://kilidivofafo.iblogger.org/54740308043.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366031/normal_5fdd15f20a83b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zasizuv.rf.gd/britain_s_got_talent_winner_2018_performance.pdfIn PDF document text
    • http://rujidita.rf.gd/honeyguide_tented_safari_camps_home.pdfIn PDF document text
    • http://nepumunu.rf.gd/lic_jeevan_akshay_form.pdfIn PDF document text
    • http://koxowasone.epizy.com/phone_caller_location_app.pdfIn PDF document text
    • http://tetigod.rf.gd/32479120892.pdfIn PDF document text
    • http://bowukedogatowo.epizy.com/bexokulasozi.pdfIn PDF document text
    • http://gijawiravutul.epizy.com/seven_eleven_annual_report.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_off0000f2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F1 5136 bytes
SHA-256: 9df246d5bb154235a9eb7f887cd8c83b75fe1720be3a359732adbf55a8fe3538
font_01_sfnt_off0001046b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046B 15336 bytes
SHA-256: 63b87e95d1a69347bb01adc9c96c277689830cedc432170573599b2423b23a68

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