Malicious PDF — malware analysis report

Static analysis result for SHA-256 43f5c1a430bdd67c…

MALICIOUS

PDF

68.8 KB Created: 2020-12-19 19:53:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 0143b2281ac99fef6a97c99c23bacaed SHA-1: 6a7879646680e7b94c68613f4546e1199191d7db SHA-256: 43f5c1a430bdd67cee457b71beb4f6b4af58a72085f0fe54256225d910cb0d3a
244 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying it as a malicious redirector pointing to 'traffking.ru'. Another heuristic indicates a link farm structure, suggesting the PDF's primary purpose is to direct users to external, potentially malicious, sites. The presence of 'utm_term=bharti+axa+four+wheeler+insurance+policy' in a URL suggests a phishing lure related to insurance.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/aws?utm_term=bharti+axa+four+wheeler+insurance+policy In PDF document text
    • https://pujawuto.weebly.com/uploads/1/3/4/5/134588096/5407856.pdfIn PDF document text
    • https://nepejudakolop.weebly.com/uploads/1/3/4/8/134876169/32b2ec.pdfIn PDF document text
    • https://xogazusuguse.weebly.com/uploads/1/3/4/4/134479670/beroniwexomuwe.pdfIn PDF document text
    • https://pasabegimukug.weebly.com/uploads/1/3/4/2/134265340/mikonenukipagud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487618/normal_5fcd1bd67625c.pdfIn PDF document text
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/dffab1288277a8.pdfIn PDF document text
    • https://rurevudo.weebly.com/uploads/1/3/4/2/134265418/d042921b03b.pdfIn PDF document text
    • https://zepinimokibe.weebly.com/uploads/1/3/4/3/134373719/730313.pdfIn PDF document text
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/5c449b3b0cd.pdfIn PDF document text
    • https://zatazonikafude.weebly.com/uploads/1/3/4/3/134340422/4619957.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/520770.pdfIn PDF document text
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/voxodibujufu-gusojowubozalat-jijiruzad-sadovuvu.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/lopadivupudexa/14154355096.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/87817395047.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/zosutabolujarofelenopiza.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_off0000cee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE1 5412 bytes
SHA-256: 19430e33199f45762d9f7776647c5f2a7e5f1d45cc3c3f9beda651ad17a698f0
font_01_sfnt_off0000e169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE169 10716 bytes
SHA-256: beaee6f6b6e71e4bde661c0c1bd6936fc2e936fab759205d71f260be16f1c5ca

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