Malicious PDF — malware analysis report

Static analysis result for SHA-256 22fc623f0c367351…

MALICIOUS

PDF

73.8 KB Created: 2020-12-26 06:33:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f566d899ffe5151ae0df5c6b5c8082bb SHA-1: 7b5da6426796946a3ed07d0a0bee61f11e6b5993 SHA-256: 22fc623f0c367351c73ee0da2237cd77752b4f90b0564b712c4340ed749f9a2a
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to known malicious redirector infrastructure. The heuristic firings indicate a malicious redirector and a link farm, suggesting the document's primary purpose is to direct users to potentially harmful websites. While no scripts were explicitly extracted, the nature of the links and the ML classification strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/123?utm_term=garmin+nuvi+260w+specs
    • https://cdn.sqhk.co/tiruxugajo/Gihkv6D/heroism_pathfinder_2e.pdf
    • https://cdn.sqhk.co/bebetirifam/TeTPfED/swamp_thing_season_2_trailer.pdf
    • https://cdn-cms.f-static.net/uploads/4446489/normal_5fc2d5a773884.pdf
    • https://static.s123-cdn-static.com/uploads/4379626/normal_5fcaf2cecda52.pdf
    • https://cdn.sqhk.co/ditetona/ijAigij/65968570077.pdf
    • https://cdn-cms.f-static.net/uploads/4416791/normal_5fd11a77eb2b6.pdf
    • https://cdn-cms.f-static.net/uploads/4459055/normal_5faeb23659d91.pdf
    • https://birivuben.weebly.com/uploads/1/3/4/6/134618962/xefiwori-wagiwefigeg-gisezexaxota.pdf
    • https://cdn-cms.f-static.net/uploads/4384461/normal_5fda5a8781945.pdf
    • https://cdn-cms.f-static.net/uploads/4369302/normal_5f88965332ae2.pdf
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/fc2f64c4611083c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/67a06f01-d0e4-4b1b-8654-143d6b5ef21f/chapter_6_test_answers_algebra_1.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e06e.bin
04032a87c82ba8f94a74cdfc17d70f9d493c99d2d7aad9ac5e578c2fc16c52d2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE06E 5656 bytes
font_01_sfnt_off0000f3af.bin
773d40a6fb3adaaf4e9c07da304132c544438e1c92df70f6338a34f65c8f4fb1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AF 11488 bytes