Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ed522b351ff1e1…

MALICIOUS

PDF

91.0 KB Created: 2021-03-09 15:27:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 58849eb038581e47aaea6d162ff937d6 SHA-1: 0539ec8a6a676ec7dd0c7ca270b2c181d7493a78 SHA-256: 07ed522b351ff1e1067b4ffbf6294f8659f0c4249788e1a17f56ff89c4796919
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/award?keyword=mahabharata+amar+chitra+katha+malayalam+pdf PDF link annotation
    • http://winoxolupuvil.getenjoyment.net/sign_of_the_beaver_chapter_18-19.pdfIn PDF document text
    • https://cdn.sqhk.co/guvelebul/harheij/lenovo_laptop_support_phone_number.pdfIn PDF document text
    • http://xakaderinetatu.mygamesonline.org/osteoporosis_guidelines_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/fapewakuw/ggtm6bh/blackboard_acc_ontario.pdfIn PDF document text
    • https://dawasaga.weebly.com/uploads/1/3/0/9/130969366/vutewakodirom.pdfIn PDF document text
    • http://ramifapufebi.scienceontheweb.net/zikijibipujavijojote.pdfIn PDF document text
    • https://jokinurelebuvet.weebly.com/uploads/1/3/1/8/131856462/de948de46.pdfIn PDF document text
    • http://bewizasosu.sportsontheweb.net/how_he_loves_me_lyrics_jesus_culture.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tavamikilav.myartsonline.com/how_to_clean_igloo_countertop_ice_machine.pdfIn PDF document text
    • http://gurabagoderes.atwebpages.com/lubiliji.pdfIn PDF document text
    • http://gogujigasad.onlinewebshop.net/88300831348.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/biocentrism_and_modernism.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/maus_1_art_spiegelman_summary.pdfIn PDF document text
    • https://626fb5af-1d67-41cb-86ce-204163677ff0.filesusr.com/ugd/9d869b_bc713e8bd8ab41e88f74a07ab21be94b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/levumoduf/72657425527.pdfIn PDF document text
    • https://8d537faf-e869-4ed9-a29f-988560fab1dc.filesusr.com/ugd/0cce51_defa1ea73fb248bb90f4b9b077dab5a9.pdf?index=trueIn 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_off00011d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6D 5528 bytes
SHA-256: 530a249e5cbfd17b9289d34bebd1e4d0c7bbcff954bacf1fdb0fded6397a3eb0
font_01_sfnt_off0001301f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1301F 15080 bytes
SHA-256: 563f5a5a2d63c2a9f66191e3d895197022616853eeb71bb2a0790b56c15b0c96

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