Malicious PDF — malware analysis report

Static analysis result for SHA-256 a396149562cfc6a9…

MALICIOUS

PDF

89.7 KB Created: 2021-04-04 02:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1343945e17d968ff617cd709a053b120 SHA-1: d3882d144967ac3154eb7be1f8318cafe997f934 SHA-256: a396149562cfc6a92a3926ce9cdc9ce3ab7ed89acf1eb5457153c4b2d1bb9636
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to an SEO-optimized link. The primary malicious URL identified is https://resalured.ru/award?keyword=baby+boomer+pdf+meme, which is likely used to distribute further malicious content or conduct phishing. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://resalured.ru/award?keyword=baby+boomer+pdf+meme PDF link annotation
    • http://laithub.pro/balupaginovuxizatirojewh1dzv.pdfIn PDF document text
    • https://naviguxiva.weebly.com/uploads/1/3/4/2/134266723/mebanavosemisaropud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505326/normal_5fc8f8b0bffb3.pdfIn PDF document text
    • http://apeech.ru/lomimituvaduwurazimesig6pe35.pdfIn PDF document text
    • https://komamezumef.weebly.com/uploads/1/3/1/3/131398541/d9fed8c1ad5e80d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477137/normal_6019510922f37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475582/normal_603687e2715d5.pdfIn PDF document text
    • http://antileqphh.site/what_is_environmental_impact_assessment_example2jzje.pdfIn PDF document text
    • http://rewita.fun/what_causes_blood_shocked_eyesia0ei.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/polis9x9sx.pdfIn PDF document text
    • http://freshmind.net/shopsmith_scroll_saw_partsbhdo9.pdfIn PDF document text
    • https://guwawafike.weebly.com/uploads/1/3/5/3/135338161/2817374.pdfIn PDF document text
    • http://electorat.org/kujisif4v72e.pdfIn PDF document text
    • http://momentikshop.space/26758632858itqng.pdfIn PDF document text
    • http://koteyarn.moscow/geometric_transformations_worksheets_high_schoolo1fct.pdfIn PDF document text
    • https://tefajarusi.weebly.com/uploads/1/3/0/7/130775660/7132265.pdfIn PDF document text
    • https://pufabakorulur.weebly.com/uploads/1/3/4/3/134320636/wumubox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378605/normal_604f64a29c1b4.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/dedinavesute/wenetuzozubimo.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/how_to_program_garage_door_opener_without_learn_button.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/kitchenaid_mixer_black_friday_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/33757130022.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/70906396810.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_off00012098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12098 5268 bytes
SHA-256: ee717ea6e3968f4e7a256d9aae47fbc77da7a78e2122024c262a33aac46e175e
font_01_sfnt_off00013271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13271 11412 bytes
SHA-256: 75392c7189186cf68b844affa539d0e7795ec767de66478ade28d95bf1005a14

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