Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f063e18dfcf851e…

MALICIOUS

PDF

72.0 KB Created: 2021-06-11 06:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a6628427205bf62df0fc2de01ca80f0b SHA-1: b855b0392eab46ba28df00ddcd03bcf1a305709c SHA-256: 8f063e18dfcf851e6b807080be513380a8f0018ac46b66471687ef60dced3c19
156 Risk Score

Malware Insights

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

The PDF contains multiple links to compromised websites, likely serving as a link farm to direct users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, with the document likely acting as a lure for phishing or malware distribution. No scripts were extracted, but the presence of numerous external URIs suggests a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=hd+streamz+mod+apk+download+for+android PDF link annotation
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/3llf6iiqeugj6b3bvln5u8vi27/25961000343.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/ot7adhmoab9hvtfg2ag78ro04b/kovojaxe.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bda3cf04816---lofuk.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aab73134d46---63711956184.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/3kj1j3oo81nvdpl8c51cqttm99/zebevaki.pdfIn PDF document text
    • https://www.propertyadvisersaustralia.com/wp-content/plugins/super-forms/uploads/php/files/1c867441c00dae2cb4969b53deffb9be/tokulipaxonukesonogeka.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/62bc1b5fd571bfb16ada358230d80434/75196607104.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160763dec01cbd---56578978883.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941e3e41dc4---49837546864.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607787e825314---94843043975.pdfIn PDF document text
    • http://global-insurance-broker.de/downloads/fujonaluzotijuzemapitami.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/d9a63b1a89d16686ff17c5496ad8351c/rinomuzisakimurab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000db4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4C 5352 bytes
SHA-256: 239f3d335ba18b9f68469d3df168891be06d3982c3246dc78edebb9bdd6559a7
font_01_sfnt_off0000ed87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED87 11124 bytes
SHA-256: e395e9b20b9493ee5dfad96e67088cc015168e31f1de56a150c231d05f91bb3b

Open this report in the interactive analyzer, or submit your own file for analysis.