Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d4dd7d350e0d9f…

MALICIOUS

PDF

69.4 KB Created: 2021-09-25 20:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e4f8f8c8857890c9cca3474a2e15ddab SHA-1: 18f3c5fa96e749ce3506b41086a5cc872de9fac1 SHA-256: c0d4dd7d350e0d9fc2b421b472c1363d9a45083a1b5cded4279fc93f071f89ea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous external websites, many of which are hosted on compromised CMS platforms or disposable domains. The presence of embedded URLs and the overall structure suggest an attempt to lure users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://krisoc.ru/uplcv?utm_term=download+free+fire+apk+unlimited+diamond PDF link annotation
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16140f466c8b47---tizeduweb.pdfIn PDF document text
    • https://axlthailand.com/imagexx/files/58813840338.pdfIn PDF document text
    • http://phone-server.com/userfiles/file/jafodogijuwasebolow.pdfIn PDF document text
    • http://zuche0551.com/upload/file/34968658503.pdfIn PDF document text
    • https://alwillislifecenter.org/ckfinder/userfiles/files/2667885739.pdfIn PDF document text
    • http://ekorob.pl/userfiles/file/petelalepirojirub.pdfIn PDF document text
    • http://proximeo.com/ckfinder/userfiles/files/96010641810.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/8c3b3050af08b0736ea31cb47e29ed29/lexorixopuvuwonelugidutez.pdfIn PDF document text
    • https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/lomimav.pdfIn PDF document text
    • https://gkia.org/kingkong/userfiles/files/dajebezupunasexopiri.pdfIn PDF document text
    • https://dienmayminhchau.vn/uploads/news_file/vutomavulijogefopalibi.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d9e68665ee---genosumotapurowoxij.pdfIn PDF document text
    • http://szm.hu/userfiles/file/tilexijivopa.pdfIn PDF document text
    • https://fotojursa.cz/userfiles/file/kosalowiligokotupudapene.pdfIn PDF document text
    • http://cx-gl.hu/images/files/74670543558.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/3491701905.pdfIn PDF document text
    • https://ijtm.in/userfiles/file/xojipawu.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/nalelutegovufebegepozoram.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/bojujada.pdfIn PDF document text
    • http://vinaaquachem.com/uploads/files/64564731346.pdfIn PDF document text
    • http://antoniolescio.net/userfiles/files/bujivonurunuwoxa.pdfIn PDF document text
    • http://meijialx.com/ckfinder/userfiles/files/zizejadali.pdfIn PDF document text
    • https://biographiewerkstatt-singer.de/userfiles/file/47617805678.pdfIn PDF document text
    • http://argyleliquidations.com/userfiles/files/12385075134.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB005 16168 bytes
SHA-256: a41c0b56b1076f37dca529e61762d51bbfadb88998f494265e2401b9e91afd9c
font_01_sfnt_off0000d71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71F 10772 bytes
SHA-256: 16fd3993936c92b3990d7c10e56069dbcb2810611b687782c1c82a7df42fce4b
font_02_sfnt_off0000efea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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