Malicious PDF — malware analysis report

Static analysis result for SHA-256 6892476c2844fff9…

MALICIOUS

PDF

78.3 KB Created: 2021-04-02 01:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ec68e52bac4783ee3169bd6f9c8e42fd SHA-1: 2ad9594700ba4ec4b3e66bc17fe7045409987617 SHA-256: 6892476c2844fff9576ba8438ca9ea76bdfeca93bb4c9257db8eaa78bdd19735
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious intent, including SEO link farming and redirectors pointing to suspicious URLs. The ML classifier and ClamAV detection strongly suggest this is a phishing or malware distribution document. The embedded URLs, such as https://lozipotod.ru/strik?utm_term=excel+vba+find+value+in+column+and+copy+row, are likely used to redirect users to malicious sites, potentially for phishing or to download further payloads.

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.
  • 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://lozipotod.ru/strik?utm_term=excel+vba+find+value+in+column+and+copy+row PDF link annotation
    • http://igafnd.org/5643243462qn9if.pdfIn PDF document text
    • http://kefets.xyz/11622930341jt7n5.pdfIn PDF document text
    • http://tomogorman.com/arris_tg862_modem_manualw6iuh.pdfIn PDF document text
    • http://moxawunanenubop.sportsontheweb.net/52843347925.pdfIn PDF document text
    • https://diriremipujuna.weebly.com/uploads/1/3/4/2/134265666/b44e1ab73e8d.pdfIn PDF document text
    • http://vowufijetapiko.sportsontheweb.net/pudetisejowowegakarigim.pdfIn PDF document text
    • http://myfirstsite.xyz/96843167530k0qnm.pdfIn PDF document text
    • https://ronukava.weebly.com/uploads/1/3/4/8/134885886/joledogewavafiwivi.pdfIn PDF document text
    • http://lazadacostumercenter.com/95946470243gytmj.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/litunux/g_shock_watch_price_in_india_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/gothard_sisters_sheet_music.pdfIn PDF document text
    • http://kizufalugomux.atwebpages.com/different_parts_of_the_brain_and_their_functions.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/58484912114.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/40795414274.pdfIn PDF document text
    • http://kewevagisugimuw.onlinewebshop.net/principles_of_microeconomics_quizlet_chapter_1.pdfIn PDF document text
    • http://sawesupunozigiv.atwebpages.com/79485737990.pdfIn PDF document text
    • http://baxewape.myartsonline.com/concise_biology_class_10_book.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/responsive_blog_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/jenis_batuan_sedimen.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/elliot_approach_and_avoidance_motivation_and_achievement_goals.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_off0000f141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF141 5540 bytes
SHA-256: c963b8cd50afc0cc2daa9d8503bb85f3f5fa8beadcfa2e7ce35b6c93d17531ed
font_01_sfnt_off00010426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10426 11420 bytes
SHA-256: 776a8d6dcf3e331413e7e5b5a7852643d256a0b8c4b2f41b5e018d90f59d15fd

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