Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f9a3e548e85b87…

MALICIOUS

PDF

43.8 KB Created: 2020-11-09 15:47:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 6b4b82af6a1f57dc6e17971da1fd169f SHA-1: 049a2a81e2fc94772c41443863c9ad61963bd9f6 SHA-256: 29f9a3e548e85b872868890ff82cc03219049f841e22cb6ac924c4daff08e829
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://traffking.ru/strik?keyword=hack+asphalt+8+for+windows+10 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392195/normal_5f8f97ff47c36.pdfIn PDF document text
    • https://melegejisud.weebly.com/uploads/1/3/1/3/131379421/7087037.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5f881ce97a706.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367919/normal_5f88f3c144462.pdfIn PDF document text
    • https://wubigunes.weebly.com/uploads/1/3/4/5/134507070/zenuxaj.pdfIn PDF document text
    • https://robitejipesiz.weebly.com/uploads/1/3/4/3/134375849/posijusaxe_sakezek_bitejipen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4c2d8013-0cd3-4125-81e5-23eee7d151cc/pros_and_cons_of_fast_food.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/51588958440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/266622de-847d-449b-a7f0-5d6608988e04/57652682830.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/51006471715.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/cornelius_brothers_and_sister_rose_album.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/67147992195.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_off00005b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B96 5416 bytes
SHA-256: 82ed381c7488f250fed6a2b732072d0e3e6a31fd04138aa734a2d2aee2baa365
font_01_sfnt_off00006dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFC 11284 bytes
SHA-256: 316dff3fffadec026561aef17d811ec99d0b6580b855527ce15e7e442166eccb
font_02_sfnt_off000094b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94B1 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

Open this report in the interactive analyzer, or submit your own file for analysis.