Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa03617e00035d67…

MALICIOUS

PDF

72.2 KB Created: 2020-11-18 13:16:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c528e96ab0c83534a22ec257fc79df48 SHA-1: d94672b9ae6c6e1d528fa95aed7e8e7c492d262a SHA-256: fa03617e00035d675d15c15cc61845d739f1877db801ec3dffd33abf5b2c6e7e
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector and another for a PDF link farm. The primary malicious URL identified is traffking.ru, which is likely used to distribute further malicious content or phishing pages. The presence of multiple external PDF links suggests an attempt to manipulate search engine results or distribute a large number of documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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=definition+corporate+social+responsibility+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384035/normal_5fa8596b0abd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419204/normal_5f9881954de8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425506/normal_5f9dbe4c6b525.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443819/normal_5fa0d1d3dfcf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408981/normal_5fa05eec64711.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413566/normal_5f9eb294c51bc.pdfIn PDF document text
    • https://fafefojesuvun.weebly.com/uploads/1/3/4/6/134651362/a25eca320b5e80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390663/normal_5f8f9ffc05e53.pdfIn PDF document text
    • https://ririrufazerox.weebly.com/uploads/1/3/4/5/134501654/3907955.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/6faa2d90-bd25-4183-8360-5fb498a83704/zufos.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/vavedulonukaluva.pdfIn PDF document text
    • https://s3.amazonaws.com/sibenuvokiwuz/anatomical_position_terms_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/zofenulagusiruzajosiv.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/introduction_to_generalized_linear_models.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_off0000dde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE4 5392 bytes
SHA-256: 5369c2f03a1d7630572b9761c58293f05a919ba18bc59102254661d126cd4a1b
font_01_sfnt_off0000f04d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04D 10444 bytes
SHA-256: dacac31ecf61749216a73881171bc4b2c3fcfdd8fd45ead8aa11c9d01edc5e9c

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