Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4f2cee4c9feb561…

MALICIOUS

PDF

47.0 KB Created: 2020-11-05 16:04:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: a6204ba150426b19c30e0586694c0a70 SHA-1: efce01919ed10d3cfad4ce83ca75310d80b86236 SHA-256: b4f2cee4c9feb561900d77af1b8f94a6d34aa3c13f3173b24023a3653d6a40fb
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafftec.ru/123?keyword=crack+android+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389355/normal_5fa15093ed2da.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/wuzeva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369645/normal_5f886d5e2d79b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407313/normal_5f93969a91867.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377697/normal_5fa0d0cb1bea9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375703/normal_5fa3ec254d539.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389376/normal_5f90a799c2fd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367922/normal_5f96870c80cf4.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/a73026d2-5c29-4860-b71d-e719ba25e430/latev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee35ec56-1d7d-4ec7-935f-550ccba76c53/restaurant_bois_le_roi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96767ec7-3a8a-4fa4-af00-3c186698bc41/gawuxoguzetuniviregome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc5961b9-d3d5-4f30-ac89-871d38408eb5/mirutanan.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_off00007099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7099 2880 bytes
SHA-256: 80960c5ef920dc812f40421d0c41ad5272b60f71c1256c1bdf7a11afd8d5b2df
font_01_sfnt_off00007ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD6 4824 bytes
SHA-256: 485a7e2f01322fd9b0f912b2bc7b1e10e9b057dc2ecb27b39fd3cc04bd26096a
font_02_sfnt_off00008b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4B 10528 bytes
SHA-256: ecfdacaba25a7bc45697782136ac2e392498400412495c2310bdff18958b16af