Malicious PDF — malware analysis report

Static analysis result for SHA-256 b07e90dd2b49757b…

MALICIOUS

PDF

69.2 KB Created: 2021-01-01 05:06:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7f55dc2f41bce0006bc421972f00cf33 SHA-1: f18e2b9d010f6fc4153f0e9b26206f03de473865 SHA-256: b07e90dd2b49757b01474b9d2c8d5196ace0ae00443506bb444d67174452f59a
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to redirector infrastructure. The primary malicious link identified is https://ggtraff.ru/strik?utm_term=poached+egg+pan+for+sale, which is likely used to funnel victims to further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://ggtraff.ru/strik?utm_term=poached+egg+pan+for+sale In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372702/normal_5f8996222be7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393904/normal_5f9828dee3e04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480145/normal_5fd2ea6860968.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/xulatadetoverudoguz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501027/normal_5fe291d70d6a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495059/normal_5fdaef4f96600.pdfIn PDF document text
    • https://kejedaxuz.weebly.com/uploads/1/3/4/3/134355680/9820686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388596/normal_5fb2d7de2289a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416512/normal_5fe4737e5fc4e.pdfIn PDF document text
    • https://cdn.sqhk.co/vawikepaf/haR0gcC/96092422950.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/e2cd9ccb-9b10-4040-967e-7540587937ff/87103465283.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f85435ec-a515-469e-b201-ca32721f884d/88234826070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/816486f6-37ca-4d3e-91c6-096ba226d9d4/79489965803.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63e68fd0-ce59-4213-9556-c2880185e68c/padatowojuvin.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_off0000d135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD135 5420 bytes
SHA-256: dc315461090d1f18a2d41163a1b3f3a1b9f335e4bc89a228610c6004b3a3f47c
font_01_sfnt_off0000e3a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A0 10840 bytes
SHA-256: 5871101d922b6e55e340ede685a6d6d707fd29cc90a62f0ebffe3bb2c2a569b1

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