Malicious PDF — malware analysis report

Static analysis result for SHA-256 14237e62ffb62af0…

MALICIOUS

PDF

62.1 KB Created: 2020-12-07 11:00:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1d044de0797c4a47970faf7fa51bd815 SHA-1: 1e31e143d960319a49e9d5d88c6de63c40e31a89 SHA-256: 14237e62ffb62af0513168c6f1c60236795cd367c4e522d124418774b457fa0a
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of numerous external URLs, including one pointing to a potentially malicious domain, supports a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://traffnew.ru/123?utm_term=glass+tube+cutter+singapore PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453327/normal_5fc0c2de56a87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370744/normal_5f88fcd524a2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450152/normal_5fbf528aa8780.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383689/normal_5f9be92b3b716.pdfIn PDF document text
    • https://zonebudufekepok.weebly.com/uploads/1/3/4/3/134382159/811737c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402289/normal_5f9801fee2a0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371505/normal_5f8f3515973c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384469/normal_5f8e040cef982.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384037/normal_5f9d98443f82e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383460/normal_5f8c6576d7564.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0dac460f2895dc1e79d89/t/5fc4d03ecb3e0f5771e6e891/1606733887294/64470896530.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_off0000accc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACCC 2900 bytes
SHA-256: 9c84aca5171cf4522e1fd23f3e5391e17c8e645cdcb740b4c3036af6865bd014
font_01_sfnt_off0000b711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB711 5272 bytes
SHA-256: b10c0befff647b918bb59c4ade53630eccf1e7fcd59155744bb486d375fbddcc
font_02_sfnt_off0000c90f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC90F 10120 bytes
SHA-256: 1e95dd973fd5e5e1b49c84fb7b02e6ac02b6b0a097ba88bbe806a2ba69ec8ccc

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