Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d05b69515172fef…

MALICIOUS

PDF

80.5 KB Created: 2021-08-15 16:34:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ab00bce76212af61d4177b9eaa5f1a93 SHA-1: d1d6b6f0532b6f85aa25b6565b49263652f81d96 SHA-256: 1d05b69515172fef6bf722fe6682f53d3d164f5b276da68fcdf5d409bb75d0a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous external websites, many hosted on compromised CMS platforms or disposable domains. The embedded URLs suggest the primary goal is to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pistant.ru/uplcv?utm_term=nokta+makro+anfibio+multi+manual PDF link annotation
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/a7885a77db7ae4e30921f4340c5138f3/11851610576.pdfIn PDF document text
    • http://phatnang.com/media/ftp/file/rijunidegitidutarup.pdfIn PDF document text
    • https://barcelonamedicalcenter.com/files/galeria/files/57672390159.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/61281960809.pdfIn PDF document text
    • https://emmaushuis.org/pages/11086114907.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/berunematomitamuvarelijot.pdfIn PDF document text
    • http://harekatmemuru.com/images/Media/files/pumulawepolafuzer.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082de4ca87fb---77868668403.pdfIn PDF document text
    • https://cqc-material.com/app/webroot/userfiles/files/92358707854.pdfIn PDF document text
    • http://masseydogs.com/clients/f/fc/fc2e217ffa4851e49ca3cd921a15cf41/File/wunabirepuninupuwad.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ca49dc26cf8---93196096623.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/ojvj6ktmqncc6os31chjqdun8l/poramejowamuludaku.pdfIn PDF document text
    • http://cherishedmomentphotos.com/clients/8/84/84fe84b553acfcd191e166b7401b6f02/File/kulogiwukujavesitogujak.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/mijanawumedevemulixikokar.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16083b0da3a416---99040707628.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b8370b4a0---junajametipap.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611728c09e319---xisowuxotolaxu.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/wilalolopujoxa.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/zewexabudazoxuzaj.pdfIn PDF document text
    • https://banghenails.com/upload/file/zotofo.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_off0000d3fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FA 10384 bytes
SHA-256: 20774ae006b138c035a62813cda7ffe90703390565645bd2fe921efa90a0795a
font_01_sfnt_off0000eb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB65 19196 bytes
SHA-256: da93777f08c79ea7532d26e6f32e0f2b5443d547ed9e721fc9f9176f7e22d51a
font_02_sfnt_off00011abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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