Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9319191000279fa…

MALICIOUS

PDF

66.0 KB Created: 2021-04-02 16:32:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f134bf037826eec35d05f70cafc8e620 SHA-1: ed856ae8674f4d2359a06fc0a6b8413c2385afc9 SHA-256: e9319191000279fa67113f1af6cc034084d97cbeac6dad09c9b2ea52c8f8984f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/123?utm_term=blessing+shumba+nhaka PDF link annotation
    • http://tronreserve.online/fresh_mechanical_engineer_jobs_in_dubaiqij9p.pdfIn PDF document text
    • http://barbanapoli.moscow/29837678899uy4ky.pdfIn PDF document text
    • http://jajokojunewi.mypressonline.com/19020149077.pdfIn PDF document text
    • http://legionmone.xyz/74535365180nnaes.pdfIn PDF document text
    • http://kawlites.online/gositamogaboti8xy1d.pdfIn PDF document text
    • http://galapaniwub.iblogger.org/25602825221.pdfIn PDF document text
    • http://tojuvapemupo.mywebcommunity.org/bitavij.pdfIn PDF document text
    • http://vumonivaxozutod.mypressonline.com/bovee_courtland_business_communication_today.pdfIn PDF document text
    • http://tetufava.iblogger.org/30358647905.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8b8503b-5ddf-4165-b51c-a735006ab42f/is_kaplan_prep_course_worth_it.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/721b2265-ee70-4779-8090-8376164c8ffa/18069711867.pdfIn PDF document text
    • https://37bcb4aa-7747-4ff6-a352-0e22bf983c21.filesusr.com/ugd/4393d3_d733cc2f4c8f4e9c87645f106fe28394.pdf?index=trueIn PDF document text
    • http://kowatiwazeferov.epizy.com/28890953252.pdfIn PDF document text
    • https://3bdad275-8828-414d-9063-9532e035d791.filesusr.com/ugd/c67d0c_fbdc029bc2784407ae6d42d248e56a99.pdf?index=trueIn PDF document text
    • https://2791e1c6-719d-47aa-bdc5-1556df251b63.filesusr.com/ugd/7757c5_bdd411525b734277912b41eafc1b6b3e.pdf?index=trueIn PDF document text
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_75d19ab26fdc4ea089ae9966cfb98bbb.pdf?index=trueIn PDF document text
    • https://3bdad275-8828-414d-9063-9532e035d791.filesusr.com/ugd/c67d0c_598624e485b14bcdb13a94d6188f3947.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d54679fc-a045-4b4f-b689-2790c17d951b/72365323002.pdfIn PDF document text
    • https://2c9641c8-5874-4869-9b94-f1378e60aa6b.filesusr.com/ugd/efc1f6_7597e21e4d444d8f8a449e677ccec796.pdf?index=trueIn PDF document text
    • https://dcc20dec-0195-4543-b617-cfb82efd15f0.filesusr.com/ugd/30ea26_e706eb44a93d42a4ae73345ae420600f.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_off0000c682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC682 5256 bytes
SHA-256: 6c03134e8e8b7f27fb0084826f42a2c8e27a7909802bce44d77208f79da505f5
font_01_sfnt_off0000d840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD840 10208 bytes
SHA-256: e46e29435d58d18d90977650b1fc317eb0f51ceca47ab5228cc053c1fcee8f54

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