Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e8c98e6aa1ffc5…

MALICIOUS

PDF

75.4 KB Created: 2021-02-15 14:09:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 94b6016282b8cab7bb9f2b29f2a0decf SHA-1: e828505a226d04ee8f478bc113efba31797aaa07 SHA-256: 89e8c98e6aa1ffc52bbde9567e51ed6c58bfd1ec509a88649350e10c67eb95bf
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 numerous embedded URLs pointing to disposable hosting domains, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to assembling puzzles, which is a common tactic for phishing or malware distribution.

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://druttle.ru/strik?utm_term=how+to+put+a+1000+piece+puzzle+together PDF link annotation
    • http://vijuziruzunubiz.iblogger.org/79989139947.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458623/normal_5fdc30a89f092.pdfIn PDF document text
    • http://xunajoza.22web.org/bangla_cricket_new_video_song.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409405/normal_60020ce41afae.pdfIn PDF document text
    • https://pazijovipa.weebly.com/uploads/1/3/4/3/134327002/b6fbd771d94.pdfIn PDF document text
    • https://kajubogoxin.weebly.com/uploads/1/3/0/9/130969430/kuvoferenap.pdfIn PDF document text
    • http://show-visitor.xyz/analytical_chemistry_7th_edition_solutionsgdwmx.pdfIn PDF document text
    • https://diwolusetu.weebly.com/uploads/1/3/5/2/135299278/310388.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467043/normal_5fdfa228b2365.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406191/normal_601dd8953c643.pdfIn PDF document text
    • https://saxenivimagi.weebly.com/uploads/1/3/0/8/130813604/rigeweru-tatetux-sirubesuzasaja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415537/normal_60272ff39543e.pdfIn PDF document text
    • http://lagutobokoza.22web.org/belkin_n600_setup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450733/normal_601fd1a0b2599.pdfIn PDF document text
    • http://xugerovogubex.22web.org/basha_telugu_movie_tamilrockers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vasikiga.epizy.com/palejebegi.pdfIn PDF document text
    • http://nenutufap.epizy.com/state_tax_withholding_worksheet.pdfIn PDF document text
    • http://jadigilotuziwir.rf.gd/dengar_dan_lagu_anderta_jujur_saja.pdfIn PDF document text
    • http://mudalulox.epizy.com/fuzedopawelezawu.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_off0000ea21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA21 5312 bytes
SHA-256: f6517fcc78bd79adfb89aff49b9fc356c72831d3bf833895aba79a651ced0dc8
font_01_sfnt_off0000fc4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4D 10488 bytes
SHA-256: 31dd71ca8e75ae22ad182add90f9b89b41873fbf5f8dc44c836f8b435a8b7eb2

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