Malicious PDF — malware analysis report

Static analysis result for SHA-256 46ddbce811b044c4…

MALICIOUS

PDF

80.9 KB Created: 2021-06-10 18:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 69835bcebe99432edc85da962c9ddab0 SHA-1: 57ab19398eec0b9dde3158dccd64f1324f10292c SHA-256: 46ddbce811b044c4135b643150450c97fc0f6cce1f520156e65a202f76aeee79
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations or utilize link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a social engineering attack designed to trick users into downloading malicious content.

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 https://oniceh.ru/uplcv?utm_term=calculator+lock+app+download PDF link annotation
    • http://www.bash.cl/media/file/55560948596.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086953bcaf9c---furijurinugelilofite.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/95038287445.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/ot52v904qs4eu7mqh0k9hdrq9h/gowikigimenef.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/6689332398.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210531205805985.pdfIn PDF document text
    • http://sicilyontable.it/userfiles/files/vipuno.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/67949170719.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/qaem543e51vfe9oekols65effo/13952811319.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/fa87714368c19283ecde0d41e48798b4/4043193817.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f26d47f8a6---kiwupaful.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160872967b2d67---16969342266.pdfIn PDF document text
    • https://vansuloi.com/uploads/userfiles/file/bonewimizovuxek.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/xosasunopafixiwina.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/9b10d2d2a60f969b97d55327ed53e5bb/nuzomaxosusugawabopir.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_off0000fe2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2B 4948 bytes
SHA-256: 34ed59481b29bac8ec9eea478ec8cdcfafae77231ebfb12634e259f0b3358e81
font_01_sfnt_off00010f1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1F 11592 bytes
SHA-256: 61cee9cec66368be8ad1decb5007faf8fabd9e6c6056190b7bfbbc3623b68d34

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