Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1e0a94dfe45c257…

MALICIOUS

PDF

88.4 KB Created: 2021-07-14 08:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 3ab38e751ba08fe4e013a48a39baa346 SHA-1: 1b2a3a35160f314341a91140fc4202d5226b50f6 SHA-256: a1e0a94dfe45c25724971d39baaff51005fd1a32d02cd24893e5b32846d5cfe5
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a link farm pointing to numerous compromised WordPress upload directories and other disposable hosting sites. The primary function appears to be redirecting users to potentially malicious content, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160885da81f316---fuxixekulonugina.pdf In PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/8c149a7266faf3181c9196619799fa6c/givaxonanokexadexofa.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/tubinexi.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/nt90vi5qajpqbonbf3fd4nt3t3/famevigukedafo.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/mamoxumazimawad.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/nixazominar.pdfIn PDF document text
    • https://mauspro.net/upload/files/majaguleburoniwawavifiza.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/varugadunonejizunodosu.pdfIn PDF document text
    • http://aifamilyreunion.com/clients/59202/File/ruxufufabasevevinase.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/orc6vio0h981rsrmu843pkkim5/xixetemakojarezetepulisis.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/a73ac4a22253004053f81c7ded07a21d/30093508646.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/c07e8c7c86fc2612cc95dd24dbd9031a/xugebilegetebap.pdfIn PDF document text
    • https://erdemlerkoleji.com/resimler/files/nanumizix.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/0f789f6ad96458d42e98e5e3fcb32a89/29380964769.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a617fe7aa33---vazobofunazikonazowidez.pdfIn PDF document text
    • http://thangmayedex.com/webroot/img/files/76679469782.pdfIn PDF document text
    • https://rendiamovisibiliglinvisibili.org/file/dexuzafe.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160eda66b3e18f---fapokorobidugazafe.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16082e62e844e9---54705053001.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16072623c8f988---xedekomodekawudapuj.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/61756333970.pdfIn PDF document text
    • http://ketoanaca.com/uploads/image/files/18312752944.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16078cffdaeeb2---solalep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=confiscated+meaning+in+malayalamPDF link annotation
    • 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_off0000f0ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FF 10864 bytes
SHA-256: a84a8eee4a448da9c27e8229b499e7a040c930401b0442a7a83ae7b5ca47d938
font_01_sfnt_off000109ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EF 18556 bytes
SHA-256: 4ac8921ba5ea4426c26f1901ccfc25e3d2dc376a2fe2d2ef5ab83dd64989ae07
font_02_sfnt_off00013a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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