Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5f405027532589a…

MALICIOUS

PDF

79.6 KB Created: 2020-11-11 03:33:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1cc62ceabbc3c4d3afcec2cc2a509a04 SHA-1: 175e8ba274540f61e5b98787bb53a8e485a095a2 SHA-256: d5f405027532589af8184c77da07cd3288e29478d5394de3f694b606dee391d9
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to manipulate search engine results. The primary malicious URL, traffset.ru, is presented as a manual for Madden NFL 19, likely as a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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?keyword=madden+nfl+19+pc+manual
    • https://gijepeparo.weebly.com/uploads/1/3/4/3/134318767/b6b783c3f4d587.pdf
    • https://cdn-cms.f-static.net/uploads/4366302/normal_5f9a2ab58bc35.pdf
    • https://cdn-cms.f-static.net/uploads/4392647/normal_5f91210c1426b.pdf
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/pagen-mugudimu.pdf
    • https://cdn-cms.f-static.net/uploads/4408706/normal_5f931b4f28d4f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9833e835-b05c-4836-90bf-c68a83648430/madogoseboparedamodirebe.pdf
    • https://s3.amazonaws.com/juduk/muvorarujol.pdf
    • https://uploads.strikinglycdn.com/files/ebb4ee90-7811-4407-85a2-32ef8d7d4303/vetawoniruwik.pdf
    • https://uploads.strikinglycdn.com/files/e84c0398-4d3b-45a4-86fc-9b72fb8b8378/mango_apk_manga.pdf
    • https://uploads.strikinglycdn.com/files/fd397f26-a0fc-477a-afdc-fcc10492f958/73427355402.pdf
    • https://uploads.strikinglycdn.com/files/f1b1e48a-7952-43ca-a65d-99724469aa3f/77430082769.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4bf.bin
bfb6bef0374b08d48d2b632ca908d22a7c40f2cd0908f26b1996e9bdfb8eb158
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BF 5240 bytes
font_01_sfnt_off0000e69c.bin
4f632e8264412e48573456557dc32da86ca7d4e8075bcfe7f1fb9a5010477fc8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE69C 10524 bytes
font_02_sfnt_off00010a99.bin
88527212b2117fc803e2cda751304f86dac819689e3c356b2e864fa3a38fdec8
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A99 23120 bytes