Malicious PDF — malware analysis report

Static analysis result for SHA-256 b29613c579598da6…

MALICIOUS

PDF

72.6 KB Created: 2021-01-27 16:30:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e2ce21c35ddc31c80e0e01913d55a1ed SHA-1: 445767ea0f56ba376562d2c9aa0aeb08b1194584 SHA-256: b29613c579598da673ed67cf801c6c560657acefb6c60dfbbfd7adc95b6c2709
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to manipulate search engine results or distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the nature of the link farm and the PDF format itself could facilitate the execution of embedded JavaScript, which is often 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-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://traffnew.ru/wb?keyword=field%20hockey%20news%20uk PDF link annotation
    • https://livadasim.weebly.com/uploads/1/3/4/3/134312527/1979667.pdfIn PDF document text
    • https://siromalad.weebly.com/uploads/1/3/5/3/135312661/jaxedefekomomig_bajeni_xigisi_kaxewova.pdfIn PDF document text
    • https://tuboxivodase.weebly.com/uploads/1/3/4/3/134387713/zisafafilajefa.pdfIn PDF document text
    • http://jalogeteka.iblogger.org/msvcp140._dll_windows_8._1_64_bit.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/hdjagh9/need_for_speed_most_wanted_2012_or_2005.pdfIn PDF document text
    • http://barurizex.iblogger.org/befunky_for_pc_free.pdfIn PDF document text
    • https://cdn.sqhk.co/lazodadevab/njiieid/79512612270.pdfIn PDF document text
    • https://cdn.sqhk.co/mifijizudi/jbggVgc/switch_pro_controller_black_friday_sale.pdfIn PDF document text
    • https://nalavawe.weebly.com/uploads/1/3/3/9/133997318/381132de81e4d4b.pdfIn PDF document text
    • https://basedupapopulow.weebly.com/uploads/1/3/4/3/134344364/6cf1445e54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481515/normal_5fc95ca87af79.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://roxegubipav.epizy.com/67785334227.pdfIn PDF document text
    • http://pujixedigegogup.epizy.com/lazepokigufemofefedileb.pdfIn PDF document text
    • http://biborufa.epizy.com/bomb_it_3_game_free.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_off0000e147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE147 4936 bytes
SHA-256: 3f30f61f2e6dde5bd784057661b4f9a3ff78d9010e3af47f839632625e35fdd1
font_01_sfnt_off0000f22d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22D 10356 bytes
SHA-256: d96721ec6e02287927dcb3d3712c9f75ae52f470e329e63209e9ec5ac2f3f13c

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