Malicious PDF — malware analysis report

Static analysis result for SHA-256 e974701bac108df7…

MALICIOUS

PDF

82.8 KB Created: 2021-05-14 15:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fcb6d07b47c6487e9bf15626a325f6cd SHA-1: c9586ada9bec2b18af1d642cde61407d500dd4e8 SHA-256: e974701bac108df73b06e2af635c9947f4b966a2f2c032c9d701d88b833462ae
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which are hosted on disposable domains, suggesting a link farm or phishing infrastructure. The document body, though heavily obfuscated, contains metadata related to a watch manual, likely serving as a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://zajinet.ru/strik?utm_term=citizen+eco+drive+perpetual+calendar+titanium+manual PDF link annotation
    • http://basvuruizleme.online/roroluvodagztf.pdfIn PDF document text
    • https://cdn.sqhk.co/perikowep/hGzgh7r/advertising_success_campaign.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366028/normal_5ffb5d022955b.pdfIn PDF document text
    • https://cdn.sqhk.co/kenoramof/hezw4Ce/18628166117.pdfIn PDF document text
    • http://espaceabone.com/xemolotaxozinisuzimedq4trf.pdfIn PDF document text
    • https://cdn.sqhk.co/korebuxaguz/dz3hhh7/grandparents_rights_in_ohio.pdfIn PDF document text
    • http://votamomitep.22web.org/durebepopolevapusox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501791/normal_5ff84751ac973.pdfIn PDF document text
    • http://sodamasagu.66ghz.com/bootstrap_material_design_dashboard_free_template.pdfIn PDF document text
    • http://busibear.com/kitatalevatajymf4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454982/normal_5ffdaa83ab849.pdfIn PDF document text
    • http://form-lnstagramcopyrightservices.com/vapujaxidifizowerakavii67e4.pdfIn PDF document text
    • http://opt15.ru/dufonugexameki7f.pdfIn PDF document text
    • http://jobipibi.22web.org/best_games_for_android_phones_without_internet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404990/normal_600f1e762f40d.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/fgj0QvR/mesozo.pdfIn PDF document text
    • https://cdn.sqhk.co/zodunoxurob/7stGght/fast_furious_tokyo_drift_characters.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418590/normal_602519d7e6590.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://generesowusavev.rf.gd/48174955670.pdfIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_657abf2379be48c4b012342f09a55bdd.pdf?index=trueIn PDF document text
    • http://kiwivesunita.epizy.com/9583472799.pdfIn PDF document text
    • https://66166ed5-207d-48ad-a5ac-83b7e977862f.filesusr.com/ugd/0d0d42_36a50a6944444015b56ee1d3634db296.pdf?index=trueIn PDF document text
    • https://bc3ee532-4344-4262-9f0b-d8353e2229a5.filesusr.com/ugd/6ca3f6_6293febaa9c745b0a5ec4ecceed4fbeb.pdf?index=trueIn PDF document text
    • http://fuzuxoluzetirig.rf.gd/lufisokexav.pdfIn PDF document text
    • https://042e50b4-45d0-4577-915a-c14d43ab21ad.filesusr.com/ugd/18f527_04728bd78f17476b849714fce8207862.pdf?index=trueIn 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_off000102b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B0 5056 bytes
SHA-256: 124faaa96f60bd70871f124a14790e1898765f51962f04f51c14979d5c894552
font_01_sfnt_off000113d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D6 11844 bytes
SHA-256: ea21e5ba1a31a2e366cbacbfe24cab32496f6f4758db39768ce5addabdf938b3

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