Malicious PDF — malware analysis report

Static analysis result for SHA-256 e229de7abf762398…

MALICIOUS

PDF

88.8 KB Created: 2021-03-09 20:26:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 294f5c1cf10aed24179046a9e5db3328 SHA-1: 39e8b53b1f9d4e9b5b78b61f2fb7b204b87087d0 SHA-256: e229de7abf762398da626df563cba10360b5e2d82c51e9bd6662ca8eda6177fa
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'ponafet.ru'. The document body, though heavily obfuscated, appears to be a lure related to sewing machines, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://ponafet.ru/strik?utm_term=singer+simple+sewing+machine+2263 PDF link annotation
    • http://itfamily.pro/fluke_megger_1507_user_manualmqune.pdfIn PDF document text
    • http://trysoda.pro/54771469163pxqqr.pdfIn PDF document text
    • http://lafuvenilimagi.iblogger.org/36335912431.pdfIn PDF document text
    • http://lisifakus.66ghz.com/free_adding_and_subtracting_worksheets_for_kindergarten.pdfIn PDF document text
    • http://7lessons.fun/how_to_wear_baby_front_facing_in_baby_bjorn5ar5b.pdfIn PDF document text
    • http://tryne.xyz/editable_name_handwriting_worksheets1v93m.pdfIn PDF document text
    • http://fastgetme.online/what_do_sunflowers_symbolize_in_dreamsfuimn.pdfIn PDF document text
    • http://zewegirugiputix.22web.org/zinevi.pdfIn PDF document text
    • http://alfa-quest.ru/navneet_kumar_mdmr8dp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kimaporedulaz.rf.gd/xikafanaruf.pdfIn PDF document text
    • http://sozofini.epizy.com/59393689276.pdfIn PDF document text
    • https://c81c1a69-aec6-471c-ac34-7a6800eafc69.filesusr.com/ugd/9ef1ea_32d700fcc5f14b50873ed5a2f7f83d93.pdf?index=trueIn PDF document text
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_7d51c2b4897b4d25b9912b950911c728.pdf?index=trueIn PDF document text
    • http://xujiwusa.epizy.com/27062346016.pdfIn PDF document text
    • http://puzazodigeza.epizy.com/21121525304.pdfIn PDF document text
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_5254e261cef84714b3689168865fd022.pdf?index=trueIn PDF document text
    • http://pemuwosefewe.epizy.com/geometric_patterns_worksheet_grade_5.pdfIn PDF document text
    • http://fabonek.rf.gd/67268628237.pdfIn PDF document text
    • http://gagutaxu.rf.gd/lederageridele.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_off00011bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC1 5992 bytes
SHA-256: 832ed86ff5893dcf786324e138fbe0c877b494366f7ac82789c381e8a2bc00a9
font_01_sfnt_off00013010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13010 11332 bytes
SHA-256: 352332c086c66724d85bce407fff6f97e8b8179abf34da2cf048f78822fac96b

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