Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe833369a64bb20…

MALICIOUS

PDF

77.9 KB Created: 2021-02-21 00:45:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 0169754cc786ba6b8cfade1db222732f SHA-1: 4dfaf8f129f5a5d65061ed41edf5bbc580409c4d SHA-256: 6fe833369a64bb2077446fde27fc5c12ef712715d35e8aa9e0a1ad84928ab392
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the nature of the link farm suggests it is used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/strik?utm_term=what+can+the+fossil+gen+5+do PDF link annotation
    • https://cdn.sqhk.co/jowowibow/jlCiiZK/ice_crusher_heater_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/hjgdqGr/happy_birthday_wishes_for_sister.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393502/normal_5ff8bc3371ab6.pdfIn PDF document text
    • https://cdn.sqhk.co/pesofesidoke/Siebqhg/why_does_my_vz_navigator_not_working.pdfIn PDF document text
    • https://mubajodopiwal.weebly.com/uploads/1/3/1/4/131454521/lazijix.pdfIn PDF document text
    • https://tuwebuliwarukor.weebly.com/uploads/1/3/5/4/135400964/6180823.pdfIn PDF document text
    • http://lozosomegav.iblogger.org/80187901.pdfIn PDF document text
    • http://boliwamipo.iblogger.org/3735715229.pdfIn PDF document text
    • https://cdn.sqhk.co/sesijisova/jimyjak/international_business_salary_nyc.pdfIn PDF document text
    • https://saletenabij.weebly.com/uploads/1/3/4/3/134339554/f67f1.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/cfhjegj/tevuriduxasox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457298/normal_5fe16090b37d9.pdfIn PDF document text
    • http://jomavuporu.22web.org/kriya_yoga_meditation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417032/normal_60318c7a319dc.pdfIn PDF document text
    • http://jazulivorif.iblogger.org/44481504899.pdfIn PDF document text
    • https://cdn.sqhk.co/dovinokobez/ihhzqfx/16109871724.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xoroniwogogo.rf.gd/bewafa_songs_akshay_kumar_mp4.pdfIn PDF document text
    • http://xavitemis.rf.gd/brts_surat_full_form.pdfIn PDF document text
    • http://xujalev.rf.gd/pearson_math_textbook_grade_6_answers.pdfIn PDF document text
    • http://difedomuki.epizy.com/sheet_music_book_kevin_leman.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_off0000f2b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B3 5324 bytes
SHA-256: b1787699dec7b6c86ed69adbd276750a5a4822b0ffef666dcda19cd05228848b
font_01_sfnt_off000104e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E2 10972 bytes
SHA-256: bb0d809954c621cfaab04ce48619408a3f33e8fa23979770e93a1e873fbc4376

Open this report in the interactive analyzer, or submit your own file for analysis.