Malicious PDF — malware analysis report

Static analysis result for SHA-256 521b7f217b7814aa…

MALICIOUS

PDF

71.9 KB Created: 2021-03-06 21:40:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: bd37428c24f6f9b2235d6a5f304fe48b SHA-1: 69ac39a8f1ef188ba52dcde0e9a309ae3830452f SHA-256: 521b7f217b7814aa41dc0c82cca01b777b50ccb78fd527ced06f61394750399d
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://baarspo.ru/wix?keyword=golf+clash+mod+apk+android+1 PDF link annotation
    • http://lifeeuro.info/paid_time_off_after_terminationi7mgb.pdfIn PDF document text
    • http://item-get.top/poviweniderubelugemuvikar3u.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/tower_of_nero_release_date_uk.pdfIn PDF document text
    • http://wdd13.ru/dungeons_and_dragons_dice_bag3uz20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484632/normal_5fd3b8eeb0498.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_6040bcaf6624a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415770/normal_600313fb2dd1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377717/normal_603c63154b4df.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/53337493132.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/votawawo/rexav.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/79690344950.pdfIn PDF document text
    • https://19aaccd0-9772-41b6-85c4-be118606641a.filesusr.com/ugd/a12125_a17d649cb8c64423a01acb6cd285db30.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/83513840243.pdfIn PDF document text
    • https://6b54b0b2-91db-43cc-88c8-bbc4f7e20b37.filesusr.com/ugd/a773aa_c77e1a9595b14dd08be15e2cad1cdc90.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/fewur.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/sydney_formal_dress_boutique.pdfIn PDF document text
    • http://zaxuzut.atwebpages.com/pofutik.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/chasing_coral_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/how_to_handle_emotional_abuse_from_wife.pdfIn PDF document text
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_731c3df821ab4c43bb5e515e184fd139.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fapaga/89867739350.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/nipireliwiguximukenobi.pdfIn PDF document text
    • http://zasuwunal.myartsonline.com/46239312460.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_off0000dc3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3F 5544 bytes
SHA-256: e9e7b1622c029c279f5e0760efb424f7b072d2a09885f3bc0c4e2e353844d4f6
font_01_sfnt_off0000eef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF7 10412 bytes
SHA-256: 343103023bc50a432d2202698700c52cf44dca28e5d43a2956b2b2d7a52590b3

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