Malicious PDF — malware analysis report

Static analysis result for SHA-256 60f9c3cf3139a672…

MALICIOUS

PDF

76.8 KB Created: 2021-03-30 05:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b42616afe9e622dfc184323428a397f SHA-1: a934abdc37b482ba0ec736198099c9e1d6036e6b SHA-256: 60f9c3cf3139a6725540e069fcbee476819c47f0baa00e517e3c69b53fc538b1
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, mezovuduw.ru, which is likely intended to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to academic content to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/award?keyword=angiosperm+embryology+pdf
    • http://skidki-day.store/21323181039lafnh.pdf
    • http://adachivia.store/fisher_price_rainforest_bouncer_seat_recallwqrrz.pdf
    • http://trafikcezaodebayisi.com/wopibemujefukamuletufepev1e22.pdf
    • http://vinnipoh.space/climbers_axe_the_forestdjbox.pdf
    • http://sewawena.scienceontheweb.net/jeliwiwasebexes.pdf
    • http://vizazovabula.mywebcommunity.org/golitebazog.pdf
    • http://xevusezes.medianewsonline.com/what_is_microeconomics_explain_its_scope_and_importance.pdf
    • http://taher-tcac.com/54148715276ytohd.pdf
    • http://tikovg.xyz/226853371317h6tc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f3dcd8e3-6656-4b47-a81e-a993d3c4f2a1.filesusr.com/ugd/aa9ef2_61f56e0e48b24812956fedc137c735fc.pdf?index=true
    • https://s3.amazonaws.com/satedafadusizo/plus_size_formal_evening_dresses_australia.pdf
    • https://a1359116-1358-4cde-afc5-3600b4bb50db.filesusr.com/ugd/3b0c81_eb8b001df2be4cbbb265271f4e92c072.pdf?index=true
    • https://uploads.strikinglycdn.com/files/64a5e1c2-ecf7-41a5-a531-44eebc6a2ae5/solasokiguxopoworab.pdf
    • https://s3.amazonaws.com/wupiwupiwot/what_are_the_characteristics_of_the_stars.pdf
    • https://uploads.strikinglycdn.com/files/036ac6c7-b1fd-4800-8dad-f997fb8f4470/95513463680.pdf
    • https://s3.amazonaws.com/kefefetafij/tejisiwijebodejoje.pdf
    • https://uploads.strikinglycdn.com/files/c9d8b6a1-72ce-472d-8d1c-e4458b839204/sigilixu.pdf
    • https://17a6c5a8-0587-4adf-8126-5b439e15a62f.filesusr.com/ugd/54bec1_13a760d6ed2f426583f44909368bc9b0.pdf?index=true
    • https://s3.amazonaws.com/rekorewexidiwo/27416141291.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efcd.bin
edf40da70835591a8bfa3f0e0cf62a1d68ee51db87144f8131aa69dbe1d71200
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCD 5384 bytes
font_01_sfnt_off00010217.bin
fd4891ae8ccbafeea97f950a77c5dc8ec3e594073beb5932c4bc7a69a83ff2ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x10217 10784 bytes