Malicious PDF — malware analysis report

Static analysis result for SHA-256 c934b7d07360dd28…

MALICIOUS

PDF

66.1 KB Created: 2020-11-24 20:54:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1e53eea26eeb24b1d8ebe078b329f340 SHA-1: 7c9ccea4a4d0bae476564300cc5d184e6d870f5e SHA-256: c934b7d07360dd28c8515cccc2591c6cef15b60880c92770fe5761e2cd984e37
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafffi.ru/123?utm_term=relic+run+apk+download+uptodown PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370555/normal_5f993def9dd18.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/loseze_bilomamaruvuti_jafamujujavaxa.pdfIn PDF document text
    • https://zawimadugujesu.weebly.com/uploads/1/3/4/7/134713294/pojebejixatax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374696/normal_5fa474cf40e01.pdfIn PDF document text
    • https://kuvixutag.weebly.com/uploads/1/3/4/3/134347355/fesinovixejamexi.pdfIn PDF document text
    • https://nipefewemaxu.weebly.com/uploads/1/3/4/3/134387654/9719886.pdfIn PDF document text
    • https://xavexedale.weebly.com/uploads/1/3/4/4/134475354/wifinalovuda.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/17503c7c-df0e-4231-b246-261a1c4d9636/old_testament_quotes_in_new_testament.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c10eb73-abce-47c5-bbd2-0bd09dd76a40/bogajuxewakugoxibana.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/bestwap._in_movie_2015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac9a3ac4-4289-4086-87f9-de79fd4156e1/maplestory_shade_skill_build.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a82841b-c49e-450d-a68a-dcf2d830163a/labeled_diagram_of_horse_leg.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_off0000c705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC705 5052 bytes
SHA-256: 45b297df49c7433abcc696368f314ac0b62a2ce6e65bb3dedf36d0800a8a2f96
font_01_sfnt_off0000d85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85A 10284 bytes
SHA-256: 145c61c62b71c5a46a76f843818c1124d5fe7c3a454ee4ff9feaa6cc42f04b51

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