Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ae62bb924749c0…

MALICIOUS

PDF

86.7 KB Created: 2021-06-29 06:42:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5af1adc5dde3266b522eee219309b0b8 SHA-1: e502d84283ceada19b9a0962b7b428338a86ddd7 SHA-256: d0ae62bb924749c07823f62708c85d089c04cf5d587116b458a068888dcaab07
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised WordPress sites. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://infrive.ru/uplcv?utm_term=microcomputer+and+networking+systems PDF link annotation
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a9630c34d---sifenifepetinatovaza.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/36842558757.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/gatijuj.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/ludozufuretuvubi.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/xawaxujijixadumofiloruku.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/nozolusonejegizeru.pdfIn PDF document text
    • https://jlgardner.org/home/jlg/public_html/ckfinder/userfiles/files/93060750410.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609456aada61c---befosaxodimatuwupul.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/40551518119.pdfIn PDF document text
    • http://smeclassof1987reunion.com/clients/37165/File/josafetilapiluji.pdfIn PDF document text
    • https://werbemittelag.ch/upload/file/sixotivupuzinapojaj.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/ceec39fc6494d995b9ba0a8964f26a4b/dukorizedonepiruka.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/15e051d2484c21ed3151c1b37c3e7fc6/zubejesuvarexulofigebuke.pdfIn PDF document text
    • https://comiconfezioni.it/file/tunolejijasime.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/93076790740.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a981c06a6---lukevitine.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609699eb4b211---mubugona.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983994d7d9d---53143147593.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/5cc43bb3ali54ftebafk2p4oa7/webor.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d2ac52fc3---36499637790.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/54be322b031d5700b4827d6b405fa060/pupulotaxikupemoxap.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/bewukijelefabipazotog.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3E 16784 bytes
SHA-256: 31f951ef6a9b9d8e84a05f10ab1fa99cd1b8af824e61283e3e23e20008ec5f16
font_01_sfnt_off00011b36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001334d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1334D 11196 bytes
SHA-256: 089159f48771b3a4a3aa184b96b42534bc45bfd375f03f9115c4099ade0ef72b

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