Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c6b4a2ccaca9eb2…

MALICIOUS

PDF

70.8 KB Created: 2021-06-16 02:33:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 80ce21eb68cfc95b381eb903a8ce6ff5 SHA-1: 3049cb9f0c6f7c5d1810a4cd98e752aaf10ec8b9 SHA-256: 3c6b4a2ccaca9eb25406a62d06c686a62ca1190515b1d721aca42cb285aa1823
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML models and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to various compromised websites, including WordPress installations, under the guise of offering free audio downloads. The presence of multiple external URIs and link farms suggests an attempt to distribute further malicious content or phish for user credentials.

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://pixomot.ru/uplcv?utm_term=brahmanda+nayakuni+brahmotsavam+mp3+audio+song+free+download PDF link annotation
    • http://activesolutionelectric.com/images/file/70315347302.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2db16eee8---27066511109.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/a1b11585ba9c9f60d4970ce77d829754/26103308569.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/489f0960350232c162504232deabdab7/48501508671.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/kiselevekomafomawox.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/91800336954.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/60827081115.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/50940059109.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16078796094f01---lowadunujebibazopatuta.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/wosoxeberonavujali.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/8c4ef53ed82408aecaabaf646253adc5/pazef.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/9cm90qb8grf562tfqerrt9514j/zixewapidebibetegatisaka.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608082c2b713d---67226748161.pdfIn PDF document text
    • https://aduanaldelvalle.mx/userfiles/file/96869272542.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/91e24624elu6anufk2upsg8f7j/dinarilowepupejogadamavij.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/5gkpss8amsn0i4hbmbleadts09/6234799870.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff53596723---90423096363.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_off0000d0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AF 6128 bytes
SHA-256: ddef7ab39d7eb291e134ab67437d768c52b50da077d14341f56eb35ca0c5572d
font_01_sfnt_off0000e57c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57C 11248 bytes
SHA-256: 7a8e6b2c5e4d200d96cf0f1dbc1a51a10edbcd5f2eaa78a9ff9d0846a7e3f382