Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a1f5573655f2388…

MALICIOUS

PDF

71.0 KB Created: 2020-11-21 03:48:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 036957c60dde8166cfd78bfe48f186c9 SHA-1: 0bc4800c87cd99510b72b710d8f3700b457a2e4e SHA-256: 3a1f5573655f23884690bcfcb8cea39cbe692998c5f615049d215f2b7b3d44b3
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a "PDF_SEO_LINK_FARM", indicating it hosts numerous external links. The document body, though heavily obfuscated, contains text related to "Adam lz net worth" and references the wkhtmltopdf tool, suggesting a lure for search engine traffic. The presence of multiple Weebly URLs and a trafficel.ru URL points towards a phishing or ad-revenue generation scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://trafficel.ru/123?utm_term=adam+lz+net+worth PDF link annotation
    • https://nurigefisigutip.weebly.com/uploads/1/3/4/6/134628418/7b31a348.pdfIn PDF document text
    • https://vedabigejiko.weebly.com/uploads/1/3/1/4/131438046/9205675.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403266/normal_5f99dccad2c5f.pdfIn PDF document text
    • https://rajivuwos.weebly.com/uploads/1/3/4/3/134398668/tegikakogitetaxoxaf.pdfIn PDF document text
    • https://fobewesepujub.weebly.com/uploads/1/3/2/3/132303403/3506479.pdfIn PDF document text
    • https://jivoxafur.weebly.com/uploads/1/3/4/3/134382284/rasaxonizikona_jiwefuzugek_vujenedunovo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/biwitus.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/bagopoviw.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/70482094730.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/all_about_madhya_pradesh.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/autogenics_3._0.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/25210657.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_off0000d854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD854 5020 bytes
SHA-256: c40999d04262e753dc4f8c51d0eb0ecc5a8c944fd0219fddb42dd3a178852d07
font_01_sfnt_off0000e950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE950 11072 bytes
SHA-256: 75b57be1ea9cc99ba7eef33ee752b091c268e77f36352327039272f1745ecdcf