Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d7650c4214345e9…

MALICIOUS

PDF

72.9 KB Created: 2021-05-15 09:33:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 69f7eb0381d457986a65e487435e648e SHA-1: 69aeab19e93d6bd9ab5f796d0cef7c02baf2ade3 SHA-256: 7d7650c4214345e957391c93fc824771ab5746d4cff7d3088ef7702a636988b4
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation scheme. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and extensive external linking suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=why+is+the+study+of+human+geography+important PDF link annotation
    • https://dutizadip.weebly.com/uploads/1/3/4/8/134889078/mazenis-walomolonexamu-zulawunesosaba.pdfIn PDF document text
    • https://lokudepapina.weebly.com/uploads/1/3/5/3/135325929/livonapozimugebosux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476564/normal_6053243e8056c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485568/normal_60382e1d89b2e.pdfIn PDF document text
    • https://wujawosekeg.weebly.com/uploads/1/3/4/7/134712458/rawaputeve.pdfIn PDF document text
    • https://zipatusuf.weebly.com/uploads/1/3/4/0/134012633/wojawadigaxe-fobivukirosova.pdfIn PDF document text
    • http://nebuxopav.mypressonline.com/benim_hocam_corafya_genel_tekrar_2020.pdfIn PDF document text
    • https://kobirozo.weebly.com/uploads/1/3/4/8/134846370/gexopazalon.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/ruzujinijujesi.pdfIn PDF document text
    • http://tonojodozif.mypressonline.com/the_college_panda_sat_essay.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424689/normal_6006c5e2c4e9f.pdfIn PDF document text
    • http://datovufes.scienceontheweb.net/75999142817.pdfIn PDF document text
    • https://dilaxizinis.weebly.com/uploads/1/3/5/9/135973905/laganuziziv_vosefed_tinozulipu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mujebik.atwebpages.com/76519868030.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/jesus_storybook_bible_advent_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/85570416150.pdfIn PDF document text
    • http://mawokale.myartsonline.com/8310563808.pdfIn PDF document text
    • http://desovizipelo.onlinewebshop.net/xuruxepojokeg.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_off0000e057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE057 5540 bytes
SHA-256: 6040d5a4f7a8c571c1cf79b6e4e8a0740a4fce79e8ae826c8fe3f79eaaade45a
font_01_sfnt_off0000f31a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31A 10536 bytes
SHA-256: b189330701a42c0c8426d1d5b700738e2c19ab86a919a229c94114ce0b680736

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