Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab4d782ec1a3340…

MALICIOUS

PDF

74.7 KB Created: 2021-01-21 22:34:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 84332580b528c440e7cabec93868de87 SHA-1: 44beffc13cf9a46f0f9dcdb459d163fc5eb6936c SHA-256: 6ab4d782ec1a3340af2c936cc91ac1cd735f15742f71fe80048315754dd146bd
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to retirement charts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffnew.ru/123?utm_term=mass+state+retirement+chart+after+2012+group+4 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453537/normal_5fc6cd515ee2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473047/normal_6009ac51a344e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421466/normal_5ff58aac1d6d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413846/normal_5ff87e473aa8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449629/normal_5fc9e94ca5dbd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386095/normal_5fcbae4ddd47d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461216/normal_5fd2352527dfd.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/Fiisjhq/power_cord_awg_rating.pdfIn PDF document text
    • http://texewofe.22web.org/kiwejosajikumi.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/Mhehiij/depugajiwukunewomi.pdfIn PDF document text
    • http://xojuxegalixiluj.66ghz.com/72705411414.pdfIn PDF document text
    • https://cdn.sqhk.co/niturunajik/gcifvge/79313600393.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/67668566517.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/birla_sun_life_mutual_fund_transaction_form.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/sujutejoranagimega.pdfIn PDF document text
    • http://zedotedifajo.epizy.com/98056674864.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/emulator_games_gba_free.pdfIn PDF document text
    • http://togipumenotu.epizy.com/apple_picking_coloring_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/doveso.pdfIn PDF document text
    • http://nodezolejew.epizy.com/warband_companions_guide_floris.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/tiluvezopikas.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_off0000e39b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39B 5816 bytes
SHA-256: 3b4f5306743daf45afd65c35d0db346240351470c80af8645612dd5d7282ae36
font_01_sfnt_off0000f759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF759 10976 bytes
SHA-256: 6aa3bb5b1c062fe4c9b8132f671e13e2bb981f53b45b67af0c9ed54c1e221a55

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