Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed1730ea78d58dcb…

MALICIOUS

PDF

43.5 KB Created: 2021-03-04 19:28:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65fa8a70c05377d04b212f4a2adcdc8e SHA-1: 257f2bac48256b72cf0a597d82e3ec9013db6c86 SHA-256: ed1730ea78d58dcbc7b2e1d32abfc4a2917ae79b96b27a69db18d88a797046af
202 Risk Score

Malware Insights

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

The PDF file is identified as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The document's structure suggests it's an image-based lure, designed to trick users into clicking a link hosted on disposable domains. The primary malicious URL identified is https://yafferge.ru/award?keyword=angles+worksheet+6th+grade, which likely serves as a phishing or malware distribution point.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6983

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 43 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • 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://yafferge.ru/award?keyword=angles+worksheet+6th+grade
    • http://piredvizhnik.com/kewarisomumejilu120.pdf
    • http://suzofovolavuk.scienceontheweb.net/rowagegevaridu.pdf
    • https://static.s123-cdn-static.com/uploads/4481069/normal_6002496d0da57.pdf
    • http://jusukigib.sportsontheweb.net/texas_instruments_nspire_cx_cas_graphing_calculator_emulator.pdf
    • http://voicebftyi.com/17247942315y7bry.pdf
    • https://static.s123-cdn-static.com/uploads/4495976/normal_5ffab2656b825.pdf
    • https://static.s123-cdn-static.com/uploads/4414514/normal_5ffcdc004c1f4.pdf
    • http://clebohets.xyz/exercice_sur_la_loi_dohma4m20.pdf
    • https://static.s123-cdn-static.com/uploads/4418558/normal_5fe4fc65edc42.pdf
    • http://niwizonoleror.mywebcommunity.org/how_to_set_up_kwikset_smartcode_916.pdf
    • http://kunepuvobimamin.medianewsonline.com/html_tags_definition_list.pdf
    • https://cdn-cms.f-static.net/uploads/4486054/normal_60333c6f302b6.pdf
    • http://nefozufovi.scienceontheweb.net/88358741866.pdf
    • http://vosajizegek.mypressonline.com/how_to_analyze_pretest_and_posttest_scores.pdf
    • http://jasunusemoki.onlinewebshop.net/mercury_25_hp_4_stroke_weight.pdf
    • https://s3.amazonaws.com/dedinavesute/general_aptitude_questions_for_gate_exam.pdf
    • http://satawakerexe.atwebpages.com/17879629557.pdf
    • http://zaduzos.myartsonline.com/math_textbook_grade_6_nelson.pdf
    • http://tuwutexo.onlinewebshop.net/67169656345.pdf
    • https://s3.amazonaws.com/divelatoxa/test_for_lipids_lab_report_discussion.pdf
    • https://s3.amazonaws.com/kavifunaruvi/pifawo.pdf
    • http://liroporuki.myartsonline.com/2601861583.pdf
    • http://tipokeviti.atwebpages.com/john_deere_950_tractor_engine_for_sale.pdf
    • https://s3.amazonaws.com/gudukupir/zivofanusipibilugeras.pdf
    • https://s3.amazonaws.com/jitimesolagun/ralufotavopivufefene.pdf
    • http://pozidijapepore.atwebpages.com/71862460962.pdf

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