Malicious PDF — malware analysis report

Static analysis result for SHA-256 b046628b9c5e9daf…

MALICIOUS

PDF

73.6 KB Created: 2021-05-30 22:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 003f90ac1c919bae1f3a3f54ad72c060 SHA-1: a269e1f4308e18406589a3ff8e65fdff01cf3a26 SHA-256: b046628b9c5e9daf85685cfd5e4d472b2e5907adccb9ad762e9712b5a4a4de29
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting an attempt to leverage these for hosting malicious content or redirecting users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these links. No scripts were extracted, but the structure and URL patterns are indicative of a link farm used for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 http://softwarefactory.nl/images/file/13659656865.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/81d9e92bfde7a7c13cbac47f9bdceff4/67586903281.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872e8b50563---bezixenezukewanufevumef.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec206440bc---purixavugekof.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d51f0bd583---62828775940.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/b29df5f6f0b046e0e3894d07fa5ae07f/bulotevazojesime.pdf
    • https://hometeamcorp.com/images/usr/ruvaw.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/8502c85f0642b0294d9b208241979f07/romisajapojexuw.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/89f832bcfc5cac9b04c73f187b16319b/11965951696.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b23d23c495c---xotuderusuvarujama.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6919baa8d---gorava.pdf
    • http://braciszewska-klimek.pl/fck_files/file/94789338206.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/lp9m180sraf8nb2jpr1nrg2n73/99930699270.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160888410cc699---8170366332.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cfdef813e2---bodez.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/suo5vfp3im3mv3j37g3so4k7b8/zetup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=giving+directions+esl+vocabulary
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0e5.bin
ccba640c252d5552af95ffc59cc0fd107dee8c26580f1d01a3162ff0abb273b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E5 5440 bytes
font_01_sfnt_off0000f387.bin
c0b3af5d9013d1e3068394411842404060e683d00509e0c537381a7552f7cbca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF387 11040 bytes

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