Malicious PDF — malware analysis report

Static analysis result for SHA-256 d98c7486b5270ef4…

MALICIOUS

PDF

67.7 KB Created: 2021-04-05 13:52:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7885d193297c5aec1b6572dc6ecdfb96 SHA-1: 2c0e17fc7ecaa351467a491134203df741a00545 SHA-256: d98c7486b5270ef401285c8eac030ef7db9ba0196977bdd76ebb3b2e242ff0ed
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 URL that is likely part of a phishing or malware distribution campaign. The document body, though heavily obfuscated, suggests a lure related to a service manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/wix?keyword=case+tv380+service+manual
    • https://cdn.sqhk.co/vifejoneses/hcjdhii/ganovejuf.pdf
    • http://bugosegu.scienceontheweb.net/10132871431.pdf
    • http://bonboxstudio.com/how_many_calories_in_starbucks_coffee_frappuccinorlgp1.pdf
    • http://sdorovie-sustavi.xyz/fejalujalepor9p70.pdf
    • https://cdn.sqhk.co/foseziwate/gggcpib/asphalt_8_airborne_perfect_nitro_triggered.pdf
    • http://smartcoin.design/how_to_make_cool_science_experimentst5m4z.pdf
    • https://cdn.sqhk.co/mesodimeduje/ifnnjhC/84821231402.pdf
    • http://lorakuze.sportsontheweb.net/plan_de_alimentos_para_diabetes_tipo_2.pdf
    • https://cdn.sqhk.co/bogonelemid/plhjAaC/zorigowaxek.pdf
    • http://tramlaweq.online/fopewezolizebobogaga750.pdf
    • http://xuwuvewisin.mypressonline.com/make_google_search_homepage.pdf
    • http://jigikujed.scienceontheweb.net/icecream_reader.pdf
    • https://cdn.sqhk.co/gujowaxexag/eo1iVhb/kobugunoxemomaxizowum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vunonam.atwebpages.com/converting_slope_intercept_to_standard_form_worksheet.pdf
    • http://gemovimuwopete.atwebpages.com/farejigiwu.pdf
    • http://kikukuvikato.myartsonline.com/6160576210.pdf
    • http://nimanexobubibub.onlinewebshop.net/jozoxer.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_off0000ca87.bin
19c6c10daf14c42b24f3b9e09d40e217b7a6e68ccf3cf62d3a9fb8d91bf9b569		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA87 5408 bytes
font_01_sfnt_off0000dcce.bin
38d0656283f4dc47cee385f6ccb12b36bfb3d5b380be5538169b387fa08ab596		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCE 10436 bytes

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