Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5feae580ca6e595…

MALICIOUS

PDF

122.9 KB Created: 2021-01-05 06:12:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6e60b0be49b81343e67aaba4e5e091de SHA-1: 24ba5ce787ae4ec4d7926f3a11d4c7a21e78df73 SHA-256: f5feae580ca6e595741ce22be03c13b659ece604ef502d37c83d7cedd0b30a20
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content, likely hosted on domains such as traffine.ru.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • 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://traffine.ru/aws?utm_term=original+reporters+on+60+minutes+australia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375350/normal_5f8a939b8c4cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417526/normal_5fe84881c4451.pdfIn PDF document text
    • https://xovigojimere.weebly.com/uploads/1/3/4/8/134854331/61b02a1d3aea32.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401519/normal_5fc4448e52df6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369183/normal_5f88ada24b17e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427274/normal_5fb5ecde3cac9.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/a4ae8ff7-cdfa-4a28-a188-3661ef821287/dujomuledudemowurunufudir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab8eba59-a59e-4134-89ff-26e9a3fc19b5/lodabinigul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6faff96-d3df-4236-a2ec-25e9bf2312d9/baskin_robbins_turkey_cake_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53895857-8124-456b-a3d0-bf24e5973f58/cactus_cooler_soda_mixed_drink.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40661b0c-4aff-4f87-9ac0-21b1461e8f22/georgia_guidestones_vigilant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1856e413-a2a3-4ab8-a000-29c40dd91760/75297844854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b45ec398-69d2-4bf3-a36b-567e86d43875/zototamafimabimebifewudot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abe2d66a-7f1b-4e7f-b72c-895e07b8ead6/futopibuworopemejol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e3c7a4f-e052-4ca7-8421-660d8a3d3e82/36773570244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0841494a-4107-4f32-a000-1f6338546be5/mituzimisewizuzodogopexo.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_off0001a367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A367 5460 bytes
SHA-256: d56d9286b1432ec0ed1cbc80cf09a3762f9ca25ba0da3011c89ce02a4b1f6f76
font_01_sfnt_off0001b5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5DE 12236 bytes
SHA-256: 7824a80cd64de5c8cec16ef2972e0c6b0b0712e2d58a343912e0052df51312c7

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