Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c7344663cab244f…

MALICIOUS

PDF

79.4 KB Created: 2021-03-02 22:08:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 01c97c1e61165417389e05e1cfdf1554 SHA-1: 4dd690dd4efb4d4bb58e4f6c68a2177609260b5a SHA-256: 0c7344663cab244f3737ab107cc04eac40e895ab668c82bb5f399513eadc0a60
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous external URIs pointing to various domains, suggesting a link farm or phishing lure. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for these links. While no scripts were explicitly extracted, the presence of external links and the nature of the heuristics strongly suggest an intent to redirect users to malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://jacksth.ru/wix?keyword=conservation+of+energy+answers PDF link annotation
    • http://formverifiedbadge.com/dymo_letratag_2000_manualagzms.pdfIn PDF document text
    • https://cdn.sqhk.co/nejijilo/Ngijfie/arcade_fire_everything_now_album.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500208/normal_5fca43499b8ff.pdfIn PDF document text
    • http://mujojodisi.22web.org/after_we_collided_after_2_by_anna_todd_read_online.pdfIn PDF document text
    • http://genusttwsr.fun/vertigo_music_discogs4nfky.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447089/normal_5fdb8f6fef825.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/17163952665qn2wp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401517/normal_5fe1ed0ad0d09.pdfIn PDF document text
    • http://xotekalulomeb.iblogger.org/nugewalozitaxigovo.pdfIn PDF document text
    • http://meetcabinets.xyz/nedovedilufesov5rzsp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/business_math_test_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/cantate_domino_nancy_hill_cobb.pdfIn PDF document text
    • http://xalatirasu.rf.gd/measure_theory_and_integration.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/ys_viii_lacrimosa_of_dana_fishing_guide.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_off0000f33f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33F 5060 bytes
SHA-256: 1863ec0f91da88dbf0c3279bfc383aaf279bb914765de0570edbfc27c3bf67cb
font_01_sfnt_off000104a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A4 13900 bytes
SHA-256: 4932294f7d8ed23f0c00866576cd171d46da90d96ec6c02fad2229382f976de8

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