Malicious PDF — malware analysis report

Static analysis result for SHA-256 137c29ce4d97949c…

MALICIOUS

PDF

71.2 KB Created: 2021-05-09 08:51:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d20c45b92905c1ec1edc384fe833018b SHA-1: 6a39e92e59e8d9fd46f33298ee97bc4a0a9b58d4 SHA-256: 137c29ce4d97949c4ebd95649815790a5108cb4353db14d64a92c760e8ef6f6f
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL `https://nipisod.ru/strik?utm_term=emperor+grandfather+clock+movements` suggests a phishing or scam attempt, likely aiming to trick users into visiting a malicious site. Although no scripts were explicitly extracted, the PDF structure and embedded URI are strong indicators of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/strik?utm_term=emperor+grandfather+clock+movements
    • http://najisemure.medianewsonline.com/62831078774.pdf
    • https://cdn.sqhk.co/xopuwomu/WjhEr1e/wanudejo.pdf
    • https://palejuzuz.weebly.com/uploads/1/3/5/9/135959315/2c333.pdf
    • http://vulufinagi.mypressonline.com/41053111617.pdf
    • https://golobixapisiz.weebly.com/uploads/1/3/4/6/134653183/tuzasazoxigo.pdf
    • http://rumigiwataj.getenjoyment.net/90687786357.pdf
    • https://cdn.sqhk.co/doxowite/hiajic7/geviva.pdf
    • https://rakevuxex.weebly.com/uploads/1/3/4/0/134040666/7819137.pdf
    • http://nipokaxa.getenjoyment.net/bumokizezex.pdf
    • https://cdn.sqhk.co/sebixodof/bM3VIib/retasuzulilanebidifeb.pdf
    • http://ribavid.medianewsonline.com/the_ballad_of_black_tom_audiobook.pdf
    • https://ramakizuwag.weebly.com/uploads/1/3/4/3/134321509/b165657.pdf
    • http://wosedumuf.mywebcommunity.org/26162729551.pdf
    • https://jimirona.weebly.com/uploads/1/3/4/2/134266163/8673791.pdf
    • https://cdn.sqhk.co/fasixazijaz/5Ujagh6/gidanakerab.pdf
    • http://lumufurisazela.mywebcommunity.org/jumowoj.pdf
    • http://metikinave.22web.org/estatuto_anticorrupcin_colombia.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/memexelu/ball_bearing_material.pdf
    • http://nudifezidezi.rf.gd/84272784347.pdf
    • https://s3.amazonaws.com/vetamedisoz/nestle_abuelita_nutrition_information.pdf
    • https://s3.amazonaws.com/duzexefemosaxe/menoranulekijagewi.pdf
    • http://pukilosik.epizy.com/is_your_harry_potter_book_worth_money.pdf
    • http://lixugafepujijoj.onlinewebshop.net/jopapikavumusuxi.pdf
    • https://s3.amazonaws.com/vokeri/sonine.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_off0000d5e1.bin
e9fe516d512670aaef678072684f468177b817234161f4d181ec3d2866acaddd
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E1 5648 bytes
font_01_sfnt_off0000e8fa.bin
cf9727ddd3abcd94b6c6a330b796af846390c9097e59633052f9b68ffe864ffc
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FA 11260 bytes