Malicious PDF — malware analysis report

Static analysis result for SHA-256 4294637d8d9d584c…

MALICIOUS

PDF

42.2 KB Created: 2020-10-08 01:16:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 62b5beaefbbf7b7c60334a86933520c5 SHA-1: a719222f2384e0601d993dce151230d8f88e2237 SHA-256: 4294637d8d9d584c677d90a152369359a6100666c5fc3f4868dc573e88807ce2
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The ML classifier also flagged the document as malicious. The presence of a link farm suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. Although no scripts were explicitly extracted, the PDF structure and embedded links indicate a malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://cctraff.ru/pify?keyword=john+boyne+interesting+facts In PDF document text
    • http://files.thatonecouple.net/uploads/1/3/1/4/131406222/muvavewemozeru.pdfIn PDF document text
    • http://files.royartist.com/uploads/1/3/2/8/132815015/wimumeza.pdfIn PDF document text
    • http://files.olgasdaughter.com/uploads/1/3/1/3/131378771/wapezaxa-bamelonara.pdfIn PDF document text
    • http://tilidi.sharkydogchews.com/uploads/1/3/1/4/131406558/d02475.pdfIn PDF document text
    • http://jefukig.goodgirlsgonegrimm.com/uploads/1/3/1/4/131454859/5018119.pdfIn PDF document text
    • http://files.lowcreektattoo.com/uploads/1/3/0/9/130969700/50914.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/52c61514-92c2-4c96-a4ec-8b4a20a77233/51307596088.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ccae21c-5591-4a90-a813-03f661e5e74f/wamefovekel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b7f261-31bd-4937-9025-e0f6c098b4fd/29848248177.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ca062ef-40db-492f-9741-ee94ecdf9a75/rixanojasom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2396b1e7-cb9f-4c78-b3e0-061b29c046c0/82191928402.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac99f166-9152-406f-93f6-bd63d9cd4986/dadomewofafelurokolajeba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d10a1ea2-9029-4a40-a237-ad8546b6f9db/91227136180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31e4282a-240e-4204-b649-bbf17a52ba6f/gonegutenazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd79d2f4-e918-41cf-9258-c5246e5efc99/6893053465.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33283328-2bfc-4368-b6e2-a363bcceb017/37316832933.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_off00006748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6748 5340 bytes
SHA-256: 9b3ba3d2218482a054edf495075d09a50cfcc3d51adb42ceafd5175c5ca2f29d
font_01_sfnt_off0000797a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x797A 10136 bytes
SHA-256: 5c6e0d104a0e2e1d95826243a9ee3fb4c56c6419b723dee25b3103802dd92462

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