Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a72c8e78478742e…

MALICIOUS

PDF

130.4 KB Created: 2021-04-06 09:21:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: bb1c593fce126c60544dbd8e0f833deb SHA-1: 58585d32218643233761252770fc0f1ed423560d SHA-256: 2a72c8e78478742e6b5910d8b3ecbe318ba7c34f2fcd2725c7cc89532f947758
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to disposable domains and are likely intended to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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=kathi+movie+songs++mp4 PDF link annotation
    • http://zibepifutidi.sportsontheweb.net/22021192273.pdfIn PDF document text
    • http://lamovingcompany.com/kexabalulowepubam0k6l.pdfIn PDF document text
    • http://promoocaoameericanas.com/age_of_empires_3_trainer_cheat_engine32hri.pdfIn PDF document text
    • https://cdn.sqhk.co/kavevanix/hahgS4T/45583460400.pdfIn PDF document text
    • https://cdn.sqhk.co/nikofilexi/jb3hjif/pewezofinuxelaninuw.pdfIn PDF document text
    • http://rent-nout.site/java_swing_button_click_event_exampleo0gxi.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/ijdQmjh/ludo_online_multiplayer.pdfIn PDF document text
    • http://devgame.design/2013_dodge_avenger_v6_0-609c40l.pdfIn PDF document text
    • http://soldonlittleton.com/854566886013ah4g.pdfIn PDF document text
    • https://cdn.sqhk.co/zajikeze/dzie2km/21586138162.pdfIn PDF document text
    • https://cdn.sqhk.co/rukeditele/6PR3ieX/photo_editing_sparkle_effect.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lelirovosas.epizy.com/business_english_books.pdfIn PDF document text
    • http://warufadul.rf.gd/cpc_canteen_smart_card_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/dirac_live_2._0_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bad1fbbe-a594-40ed-92b1-455e96111ad7/67946117685.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/roaster_oven_oster_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90e8cbfa-35d0-4b98-9611-99655ff84cc3/what_are_the_major_elements_of_poem.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/tasodinidez.pdfIn PDF document text
    • http://majezomisi.myartsonline.com/principles_of_genetics_textbook.pdfIn PDF document text
    • http://felixoxajaxev.epizy.com/excel_freeze_panes_across_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/wavutolupegabetamurefuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9078d58-ecd9-41aa-b3e9-99dc3c750c2f/10899558674.pdfIn PDF document text
    • http://muvamubas.atwebpages.com/akeelah_and_the_bee_book.pdfIn PDF document text
    • http://pozulunifo.rf.gd/muxonuzuludaniluxuxin.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/vovugujafewiramegoluvod.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001da56.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1DA56 20056 bytes
SHA-256: a91635fffec2ffa85873abb4e5d31dcc98f662a67c952fd5e0e3f8481b4ce2a1
font_00_sfnt_off0001a063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A063 5224 bytes
SHA-256: c4a4428eb34b684bcc2370f82eec4b405b608f6330e36ac8876a1fdd47a5233f
font_01_sfnt_off0001b21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B21D 11920 bytes
SHA-256: 068f3d70bcc0675c7ba144c7706a328f763846b755051fef5c663690f7083349