Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fb7c7dbd8a70604…

MALICIOUS

PDF

58.6 KB Created: 2020-12-17 13:14:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ecb24456c65018cef0f56ca32da76c42 SHA-1: 9870ad4fba62ec719825b18fe30ffff2d87a0e88 SHA-256: 2fb7c7dbd8a7060492cc0dac06519f003b765c136258f2ba0da7c85e206bd018
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to 'trafffe.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, further supporting this. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature. No scripts were extracted, but the presence of external links implies an attempt to redirect the user to a malicious site.

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://trafffe.ru/123?utm_term=botw+classified+envelope PDF link annotation
    • https://xavidupi.weebly.com/uploads/1/3/4/7/134723560/27bd27baa32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372384/normal_5f89df3713813.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449417/normal_5fd27fc4bacf8.pdfIn PDF document text
    • https://vesovagesigopek.weebly.com/uploads/1/3/4/6/134614223/mukodum.pdfIn PDF document text
    • https://xovadodelemowuz.weebly.com/uploads/1/3/1/3/131383330/negujavedusewo-fowixefipewu-bipuliwajad-roperuwetumaxok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408478/normal_5fa6157220f0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480414/normal_5fcc915501ffb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373776/normal_5f93239496115.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/5fc14640df132613bbc04837/t/5fc394b0a97599144e665726/1606653105166/water_cycle_pictures_with_labels.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1c697bda9c57a97c4683c/t/5fcac33ec5f5803bd3f294cf/1607123775508/livunadoledemuk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc00c29085bf90c0ef85582/t/5fc1768c3c02f22b9d446077/1606514316896/vocab_level_d_unit_9_synonyms_answers.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_off0000aa33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA33 5252 bytes
SHA-256: 8d3a92b5593c6f8df55dd33050d77481317903856f27245106ecffa847f7581a
font_01_sfnt_off0000bc46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC46 9816 bytes
SHA-256: 4724a7c92c0701f8d92400943671e8d1de00c4887ac2c8a7fa6648910f7eaa99

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