Malicious PDF — malware analysis report

Static analysis result for SHA-256 17fdf2d2ad32ca0b…

MALICIOUS

PDF

78.6 KB Created: 2021-04-07 07:39:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b91d55602accec1be20a8c18a931c7c6 SHA-1: 500d01a7eed45862928bff4133471bdba186b067 SHA-256: 17fdf2d2ad32ca0b3037d3406e0d09c29d6f153b5bfcd202379bd21c2e98c5eb
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to exploit users by directing them to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/wix?keyword=what+is+contra+dancing+wiki PDF link annotation
    • http://gokawojop.scienceontheweb.net/display_base64_encoded_in_html.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475000/normal_604a9b788e9c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421341/normal_601de335aefd1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370278/normal_6004aeada4ea7.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/ihlqicx/80854572173.pdfIn PDF document text
    • http://kufowawixapiva.sportsontheweb.net/which_coffee_machine_to_buy_for_home.pdfIn PDF document text
    • https://cdn.sqhk.co/woberimi/JjaOhdS/3d_bowling_game.pdfIn PDF document text
    • https://cdn.sqhk.co/baziwuwe/jfG5Zhc/75164412270.pdfIn PDF document text
    • https://cdn.sqhk.co/sepetuvab/jjfqn7d/ps2_frogger_beyond.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427093/normal_602f7a0bdab4a.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/XhaogeR/65622488447.pdfIn PDF document text
    • http://pejelurim.getenjoyment.net/wikiledosobekuk.pdfIn PDF document text
    • https://cdn.sqhk.co/vorowobenune/fhigigC/71310977376.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383802/normal_5ffd579111641.pdfIn PDF document text
    • https://cdn.sqhk.co/doginifa/bj0xidi/n._o._v._a_legacy_apkpure_download.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/folexapurilowe/calculus_volume_1_by_tom_apostol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdcfe43b-f654-43b0-b567-bb1cb7b716c7/78133604448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0fd9d0b-1be2-4fcc-bb69-c176592d909e/what_does_fisherman_mean_in_english.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/kayla_itsines_ab_workout_cosmo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a1f281a-1fb5-4372-9415-af5b267193b6/franz_kafka_the_trial_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfec5967-97f2-4b46-95cb-e2f629fb95ea/what_causes_transmission_fluid_to_leak_from_dipstick.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f06a308-9cc1-41db-a8e2-781bcda8aaa6/msi_z77a-gd65_gaming_bios.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/kidakawobokimutubefumuz.pdfIn PDF document text
    • http://pezamax.myartsonline.com/86203372869.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_off0000f594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF594 5336 bytes
SHA-256: b518b3d19d80dd851ee0fceac77cf1ecd5c1252dbf69810fd0d0722661874688
font_01_sfnt_off000107d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D0 10828 bytes
SHA-256: 8ff7dfb5d6b43ec54a012c98f80fd285aad1665ce5bc0d8410f2b99452184501