Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1fe2f81d56cbb7d…

MALICIOUS

PDF

74.7 KB Created: 2021-06-20 03:51:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a9cd04f12dce7e491752bb95bf6254de SHA-1: 93ac62017a7673021d0f45a81487deb5e599b4af SHA-256: e1fe2f81d56cbb7d9bfd26e9b7fe9ac0df6e03dbc60a57228705121418c0091a
156 Risk Score

Malware Insights

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

The PDF file is detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or trojan delivery mechanism. It contains multiple links to external sites, including one that appears to be a lure for a "Media creation tool" download. The presence of numerous links hosted on compromised WordPress sites suggests a broad phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://irlanc.ru/uplcv?utm_term=media+creation+tool+1903+64+bit+download PDF link annotation
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/b6e9718304dc530dda51ac4e1c743f85/tovosugu.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/gonison.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/ae3e5f6cd96036eab44aafbe4f9c3c16/fafejexilokutotadubawujeg.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/bbe3c9870c6ccdb8649f9fbbef11d25d/89788069076.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb0a0e2bf8---55035396186.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/cb7ada477f2c441d5e7389872a84d086/nikawalifopedajazagenise.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/21086162805.pdfIn PDF document text
    • https://marmarases.com/upload/ckfinder/files/52561100059.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/7b7cc03bed0feadf00619a02ca994c9f/43676632852.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210510161429.pdfIn PDF document text
    • http://enjoybowlramenandpoke.com/uploads/files/mumafuladaduni.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086949c34f21---62116964847.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d271bd365---46373275319.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/16ce6eebb6c60513b89e08e7f43de035/luzomixevox.pdfIn PDF document text
    • http://chokmanee.com/userfiles/file/10086535152.pdfIn PDF document text
    • https://gea99.com/ckfinder/userfiles/files/nividipuluxoguropat.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c48b03c4efc---konalepopakefimamod.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_off0000e3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FC 5748 bytes
SHA-256: 0c1ee911e0d7a02e26b211d62b64daa725981dd188097989c4210a4729256764
font_01_sfnt_off0000f7b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B0 11052 bytes
SHA-256: 9e4d4c346c527734186aa0112cbe2e5c51b3cd0e4b9bfbfac0c69405e3946cff