Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e29e14123df0f92…

MALICIOUS

PDF

77.5 KB Created: 2021-05-10 20:15:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 68cd401e6d3779652261f2142bdc87f3 SHA-1: 6e6fada6602dc8a2ad3dda716d7bdec0aafa67ca SHA-256: 7e29e14123df0f92eb3d985aa1fb496c7ea16b8eb925c35992ec328dfb5b26d5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to financial queries, directing users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/strik?utm_term=corporate+finance+starting+salary+in+india PDF link annotation
    • http://meetsoda.club/71576240039hhmjg.pdfIn PDF document text
    • http://fikakutipid.mygamesonline.org/renavigovad.pdfIn PDF document text
    • http://flymoney.net/lagu_hanya_rindu_reggae_metrolagual7i2.pdfIn PDF document text
    • http://sq11mini.com/bose_wave_cd_wont_playcxc8c.pdfIn PDF document text
    • http://frut-tree.site/how_long_does_it_take_to_cook_roast_in_crockpot_on_highql01g.pdfIn PDF document text
    • http://bekopomulasebi.getenjoyment.net/17884146525.pdfIn PDF document text
    • http://manapuzasupin.sportsontheweb.net/patron_burda_gratuit.pdfIn PDF document text
    • http://top-salez.site/herbert_and_katherine_jacobs_first_hj4bj9.pdfIn PDF document text
    • http://beautysss.site/boulder_county_sheriff_s_departmentnr5ot.pdfIn PDF document text
    • http://flowerport.store/zefepu3ynyu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kutoxinupuroxo.onlinewebshop.net/53311510573.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e53e146b-bb6d-4a79-bdd3-29d47fc5186b/outlander_series_paperback_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab21ca2c-6bf9-4735-8a73-1709bd024bd5/frases_de_buenos_dias_princesa_hermosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d19ce63-5534-4c34-bff6-dc38c4ba209e/32892865868.pdfIn PDF document text
    • http://buwifojozoziden.atwebpages.com/what_is_bacteriophage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97b5100d-7c3b-428a-b1c5-fee6626fb20d/latin_and_greek_roots_and_affixes_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/498af0b1-8861-46ff-a060-c7b0b4103657/contemplate_then_calculate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/879d9789-0d61-4de4-940c-a6391e6a3444/zujabakozixeguribopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edce06b2-e621-4cdb-97e4-d529462f5937/is_keto_cycling_effective.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e776c8d0-927b-4974-ac53-280295b9a3cd/woods_l59_belly_mower_belt_routing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ee3258c-9d32-4214-926d-46e7245e96ba/roligadoraludefojezuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91badb08-afb1-492b-b56c-9e4feb0726a1/what_is_the_equation_for_half_life_in_chemistry.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_off0000f18b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18B 5328 bytes
SHA-256: d9dfbf636324fdc66cb78dee3fba07117efef66ee170b7be3bde9640e71383f5
font_01_sfnt_off000103bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BF 10844 bytes
SHA-256: a7d374a3f11c9ae5a6a054c03066e10bbd2e2bec537d4ce20517f087bb8f80d0

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