Malicious PDF — malware analysis report

Static analysis result for SHA-256 774df8e29f88daa3…

MALICIOUS

PDF

84.0 KB Created: 2021-03-17 03:55:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d9a9247cb9ef65108d1b66f5755ec97b SHA-1: 20dd3cfb3aae4543433967e5aefe22f6034986bf SHA-256: 774df8e29f88daa3318a79e6847554fd6257c1f4bf8ca7b60129078e496c1fea
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable domains and flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the sheer volume of suspicious links suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://leonvi.ru/award?keyword=public+health+definition+pdf PDF link annotation
    • http://fonujameritules.getenjoyment.net/marketing_plan.pdfIn PDF document text
    • https://cdn.sqhk.co/molodomo/ibbqTih/last_cloudia_tier_list_global.pdfIn PDF document text
    • http://tumerasiwabuzip.22web.org/62712167910.pdfIn PDF document text
    • http://zezasarasojid.mywebcommunity.org/77370184622.pdfIn PDF document text
    • https://cdn.sqhk.co/kinuneba/09ehiib/rock_ringtones_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/jitiajb/fashion_doll_makeover.pdfIn PDF document text
    • http://zoxodur.sportsontheweb.net/65336839878.pdfIn PDF document text
    • http://pasikufopubiwo.mypressonline.com/42615094791.pdfIn PDF document text
    • http://mekujoviwe.mypressonline.com/zizinuwefetul.pdfIn PDF document text
    • https://cdn.sqhk.co/xukigipeduve/pQlqCgs/bavijademopeguvaperiza.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/16c6de24-3264-42a5-933c-e5b4d4620242/how_to_hold_a_lacrosse_goalie_stick.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/772db64c-085b-4089-be07-bd877a945272/93441350375.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22c851ec-fab4-4eca-b972-2881279df63b/68633325893.pdfIn PDF document text
    • http://luviwozota.rf.gd/is_there_a_final_fantasy_16.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/528ba2c9-6021-4f2b-9892-4470090c5776/augustine_on_free_choice_of_the_will_book_3_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/warhammer_40k_codex_list.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/keto_diet_shopping_list.pdfIn PDF document text
    • http://pipubim.rf.gd/43638910436.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa98366d-0f09-4a7c-ba0c-ea6c8f91352c/how_much_is_a_2012_jeep_wrangler_worth.pdfIn PDF document text
    • http://lexamokoxerum.atwebpages.com/jomafatip.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/katupawu.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/19667419344.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF565 5112 bytes
SHA-256: 2a4d7458c70432436cdc0f79d4c8ef234928122e4e617a120d781b7edfd3eae1
font_01_sfnt_off000106c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C6 11580 bytes
SHA-256: 39b6c32f9489303ddefa82958a19bd84ede59960a109f2c14250c2a8bcce25c2
font_02_sfnt_off00012d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D53 16060 bytes
SHA-256: 503f5200e83b189a546b6c6e1d808633a9135186956fe76ff9bd78de3d91e3c6

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