Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e459e52e3e1f4c8…

MALICIOUS

PDF

81.2 KB Created: 2020-12-22 20:08:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 428ab5a851d176f6c29449ba42d5ac84 SHA-1: 62b4f18e63a5fe7a1587bbce832fe07f89fbf547 SHA-256: 1e459e52e3e1f4c84460c77d2293feaac8b5d7847a718ac7b9fd29b816b06590
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or link farm attack. It contains numerous external links, with one prominent URL pointing to 'traffset.ru', suggesting an attempt to redirect users to potentially harmful websites. The PDF structure and embedded links indicate a tactic to manipulate search engine results or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffset.ru/123?utm_term=graal+background+codes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5fbf80db06ace.pdfIn PDF document text
    • https://sojabejob.weebly.com/uploads/1/3/4/8/134890412/4542054.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422144/normal_5fdd4947e2f0d.pdfIn PDF document text
    • https://pexajutamog.weebly.com/uploads/1/3/4/7/134759810/a8ac5df4528.pdfIn PDF document text
    • https://latenenagizogip.weebly.com/uploads/1/3/2/6/132696064/9846321.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385880/normal_5f915cf1997f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391314/normal_5fb2b82101f11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384828/normal_5fc4c37037933.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5fb7023280d4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387427/normal_5f8dc2cbc5dcd.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/kavalukato/roblox_got_talent_piano_sheets_faded.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f72d7cee-f446-469c-a4c6-c4f806a924e6/chocolate_cake_for_breakfast_danielle_hawkins.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AA 5340 bytes
SHA-256: c952dfa690e95ab93e0b538c31f3edd664ca49deafc935b1e964f5a5286e53b4
font_01_sfnt_off000106dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DC 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00010f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F69 13320 bytes
SHA-256: a0b2bbdba8c1bca2d96adcd656323b7f2bbdf60a9c9729678fead265d1d27395

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