Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3daab8c7550441e…

MALICIOUS

PDF

72.8 KB Created: 2021-03-03 09:13:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f4162f1e20fb459508d76b25a8e09c6b SHA-1: 139180315a0f2984284d2af517d4975825c38503 SHA-256: e3daab8c7550441e2b77cab41e023814e4ed49890b96b077e89e13c2810488aa
296 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 8

  • 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 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://kiradaropamun.weebly.com/uploads/1/3/1/0/131070158/bobusedelu-wemusababuzunu.pdf.
  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://jacksth.ru/wix?keyword=transcribeme+audio+exam+answers+april+2020 PDF link annotation
    • https://kiradaropamun.weebly.com/uploads/1/3/1/0/131070158/bobusedelu-wemusababuzunu.pdfIn PDF document text
    • https://cdn.sqhk.co/lojumisebu/jejaXjd/tile_matching_game_online_free.pdfIn PDF document text
    • https://xesinuvukuwufo.weebly.com/uploads/1/3/0/7/130776104/lotop_pimavetapujafi_tegor_potem.pdfIn PDF document text
    • https://ginekimef.weebly.com/uploads/1/3/0/7/130738874/9642165.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzitomizaj/cgcrgcx/73023158332.pdfIn PDF document text
    • http://profapp.pro/fivowauoyiu.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/hOjgjec/88587711475.pdfIn PDF document text
    • http://magnitoli-2ekran.site/crypto_stocks_2020xagk1.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/watajive/turufudi.pdfIn PDF document text
    • http://kusofiwu.epizy.com/9572228865.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/58275204253.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/ministry_of_finance_annual_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/bengali_prosenjit_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/45278299611.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_off0000dec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC0 5740 bytes
SHA-256: 131bc756e75feb587accf1e77ea4b6dc204f0721c8b89b01c23af7507a0508cb
font_01_sfnt_off0000f246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF246 10628 bytes
SHA-256: 629e78e354173f8e394e8f4abfd50ed8bc72fdbd9e067c12b66708c27cb15fa1

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