Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d123dd54338df8…

MALICIOUS

PDF

107.8 KB Created: 2021-05-28 11:51:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 67cfb3be78086ecb1acdc28e648d420f SHA-1: e98dd16446136a6958b93a9bc2a70eb75cc6e38f SHA-256: 07d123dd54338df86daa4ba8fd10f9729ef1cc19c5b74dbe05b284a210f10b02
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious sites. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, further supporting the link farm hypothesis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 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://seumenha.ru/strik?utm_term=college+of+satire+5e+review PDF link annotation
    • https://zizovelet.weebly.com/uploads/1/3/1/3/131380569/333c5481.pdfIn PDF document text
    • https://fajenususa.weebly.com/uploads/1/3/4/5/134588094/zutafudesixe.pdfIn PDF document text
    • https://minadefimufev.weebly.com/uploads/1/3/4/6/134635785/8740756.pdfIn PDF document text
    • https://surujesuf.weebly.com/uploads/1/3/4/7/134773125/vuxogakege_jumeponokor_togukuge.pdfIn PDF document text
    • https://lameperitilexi.weebly.com/uploads/1/3/1/1/131164355/navekak.pdfIn PDF document text
    • https://melajepanaxon.weebly.com/uploads/1/3/5/3/135398769/xirijaxisigaju-nezalurad-zafagusesomibin-vegudo.pdfIn PDF document text
    • https://wenadowepafim.weebly.com/uploads/1/3/4/3/134314247/5161200.pdfIn PDF document text
    • https://kuboteradaragi.weebly.com/uploads/1/3/1/4/131482952/jalunikonide.pdfIn PDF document text
    • https://tanezogifa.weebly.com/uploads/1/3/4/3/134321065/6161025.pdfIn PDF document text
    • https://xizotikozuza.weebly.com/uploads/1/3/4/5/134587863/958979.pdfIn PDF document text
    • https://pulatufulufu.weebly.com/uploads/1/3/4/6/134610330/dajexepoleramis.pdfIn PDF document text
    • https://funifagokose.weebly.com/uploads/1/3/2/6/132681236/ba9b56a6fb6e9.pdfIn PDF document text
    • https://gesogakit.weebly.com/uploads/1/3/4/5/134581759/6480337.pdfIn PDF document text
    • https://mabulibatelirip.weebly.com/uploads/1/3/4/5/134597637/sasijekaputod_xozafuvanig_resumezoxigemox.pdfIn PDF document text
    • https://dizorewumuzesab.weebly.com/uploads/1/3/4/0/134012942/9ede59.pdfIn PDF document text
    • https://tidatulo.weebly.com/uploads/1/3/2/8/132815220/5004191.pdfIn PDF document text
    • https://kuvijoxujav.weebly.com/uploads/1/3/4/2/134266993/gifobizavanode_budatigo_fenufesizikemu.pdfIn PDF document text
    • https://xobisejuzato.weebly.com/uploads/1/3/4/6/134694252/3f1912.pdfIn PDF document text
    • https://nekurunezofadi.weebly.com/uploads/1/3/4/8/134892804/6820861.pdfIn PDF document text
    • https://nefitajufu.weebly.com/uploads/1/3/4/7/134712437/9640159.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3b4886f-54cd-4846-8b81-af9ee8d08bbe/carry_out_phrasal_verb_in_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fea30cb9-85af-4b58-a3ea-1ff6fde220b3/temuxebutofonijoguzurexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/355513e1-a514-49a1-bd43-b1746ca400fa/tecumseh_carburetor_repair_manual.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_off00016a75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A75 5116 bytes
SHA-256: 9799e969ec3615ba28eb910062d267b2a6031f5d5dfede067a5bc391116a98e7
font_01_sfnt_off00017c09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C09 10624 bytes
SHA-256: e7942713f167f146eb1ad8cf87cf961bacaca5b5c02ccbf07967edadd4737426