Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b974ca2810c9835…

MALICIOUS

PDF

86.4 KB Created: 2021-02-28 06:11:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: e2e07fb032243e85bbb286ae367eca2a SHA-1: 6ef389bcf192b10918e0f288f1272184b1b75359 SHA-256: 0b974ca2810c983514dba4f78a1a32dc61b3d4fad6d40a5e4110298ef84a5dac
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to domains that appear to be part of a link farm, with many hosted on disposable or low-reputation domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is an SEO manipulation tactic or a distribution point for further malicious activity. No scripts were extracted, but the presence of external URIs and the link farm behavior indicates a phishing or malicious redirection attempt.

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://leonvi.ru/wix?keyword=john+hart+memorial+library PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411250/normal_6034ff72da675.pdfIn PDF document text
    • http://gradstroy.su/naming_organic_compounds_worksheet_with_answersizrc2.pdfIn PDF document text
    • http://qrastenmap.online/sevevifcnf08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383165/normal_603b051d42724.pdfIn PDF document text
    • http://lifeshop.pro/blades_away_tipskki7r.pdfIn PDF document text
    • http://ruluzuzadol.mypressonline.com/12098260218.pdfIn PDF document text
    • http://gatowixipeba.mywebcommunity.org/city_of_fallen_angels_audiobook_vk.pdfIn PDF document text
    • http://wejowadizabudex.mypressonline.com/mental_endurance_synonym.pdfIn PDF document text
    • http://digitaltoolsfor.xyz/discord_purge_messages_from_user3hjnw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384632/normal_5fd2bfba53211.pdfIn PDF document text
    • http://zuregazezoral.mygamesonline.org/fufesaxel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413848/normal_601646e592da0.pdfIn PDF document text
    • http://furniture21.online/16798858634qvnrn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368246/normal_5ffc2c708ae12.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/13885318236.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/gotenukevepunin/camrose_morning_news_police_report.pdfIn PDF document text
    • http://zitasixan.atwebpages.com/amos_and_boris.pdfIn PDF document text
    • http://megigezorozo.atwebpages.com/99098143960.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/tomotilanebozedeguvaxor.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AB 4976 bytes
SHA-256: 64589f25f9df8bf19ebbb6db22470ec6481aa01a381bb1c5bbb7afaaf78db2c2
font_01_sfnt_off00011274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11274 10504 bytes
SHA-256: 6dbad11ad7a6cc1a1af12cab7e1cda36c2cb4a036376c4b8eaf75b394f9124f5
font_02_sfnt_off000136b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136B2 16144 bytes
SHA-256: 2a5f1667c2e343500efde63e3dd6a136498333968b1680966ac5eb34589f1174

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