Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e3e9a81bcf12646…

MALICIOUS

PDF

78.4 KB Created: 2020-12-26 22:41:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 06dc444e0b897917ecf51146d5100929 SHA-1: d33ed3a693dbe4fb1230782201d2ca320750550a SHA-256: 1e3e9a81bcf126463768fbc34fe8c8b9d4c4779c1c7e4b05a1181fa73265912b
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to other PDF files, indicative of a link farm for SEO manipulation. The primary URL, https://trafffi.ru/strik?utm_term=off+road+car+qx, suggests a lure to a malicious site. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution.

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://trafffi.ru/strik?utm_term=off+road+car+qx PDF link annotation
    • https://pitimonajavigo.weebly.com/uploads/1/3/1/3/131383860/begonumibase.pdfIn PDF document text
    • https://nutefowamedez.weebly.com/uploads/1/3/4/3/134330341/zakikuleka-nukavapegep-nuwaguna-doxawovare.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408878/normal_5fc86600525b6.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/lukepepe/domafukusobi.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/arjun_reddy_movie_isaimini.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/71373693031.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/brother_sewing_machine_manual_sq9050.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5afda788-ee00-486f-aacd-6406e54e2400/buruwaxenikezuzigi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69fbae43-4842-45ab-8172-8f608fc7b849/34201671839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39de27b1-a748-4506-9e56-1dfe11354b42/1_john_quiz_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/skype_v_my_tnh.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_off0000f645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF645 5024 bytes
SHA-256: 9564239a8a79e0291837b2bf7ad8343bb95f6ac44ea5ede335e864a73be563d7
font_01_sfnt_off0001076e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076E 11128 bytes
SHA-256: c4c3e064656d03f1a2bc21aa2390d66afb3aef6378dcf8cd187b034b0b2d1aae