Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8c116fb9000d1af…

MALICIOUS

PDF

66.5 KB Created: 2020-11-13 04:14:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 0d2afba42bd4444687fada11ff888525 SHA-1: 1b5f888aeed5c52e138834111f45b3e02e2d8b6f SHA-256: d8c116fb9000d1afc8f5aed6d73afd3cf1f2ff598affaa7d9e2aaa583f5aba62
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing or malware distribution attempt, specifically flagged by ClamAV and an ML classifier. It includes an external URI pointing to 'trafffe.ru', which is likely part of a phishing or malware delivery chain. The document body, though heavily obfuscated, contains text related to 'sauna wood stove for sale', suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://trafffe.ru/123?utm_term=sauna+wood+stove+for+sale PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370996/normal_5f9a60cb9fd59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403118/normal_5fa51e5f83202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404512/normal_5f99f8598ce81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371023/normal_5f8f9e88db751.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406213/normal_5fa34832bff2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367674/normal_5f88514cdf50f.pdfIn PDF document text
    • https://pezosoxebigaxox.weebly.com/uploads/1/3/4/3/134337327/d5e66be4fd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372080/normal_5f90905ae6b43.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/pazerogasarinu/jhoom_barabar_jhoom_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/94508236909.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/41409909107.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/asthenopia_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/79050316610.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/76751706594.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_off0000c916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC916 5156 bytes
SHA-256: 2bc044272b3c23962ca0f838291b64fcf6c0613122ac67d1ea8fee97c97009e8
font_01_sfnt_off0000dac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC8 10184 bytes
SHA-256: 903dbd8efb34b6db955f0d1e64c80e956ddfb751b4062235116f45c5f385b8fc

Open this report in the interactive analyzer, or submit your own file for analysis.