Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a8e0302c496efb…

MALICIOUS

PDF

81.6 KB Created: 2021-09-06 11:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 58b944e5d8b6cbbb877f1c6f54e60c52 SHA-1: d71f269258e8424b91a71f90f9c36c6bb9244807 SHA-256: 01a8e0302c496efb7f27ddaaddb29f57dc53323652ee90b973ae10f08c4f1a3a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection indicate an attempt to deliver a payload or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://wastran.ru/uplcv?utm_term=pyro+chem+installation+manual PDF link annotation
    • http://skkouty.cz/ckfinder/userfiles/files/57932294305.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/vonaritorizope.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/34615696513.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3671548ae---reduvokazubezene.pdfIn PDF document text
    • https://zerling.eu/nico/images/files/niwipukenekigedesikuzuf.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/d56608373306ca9c1c28a1d4d591783b/21104292408.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/6d0803b1cc7c8e7d48ebc36b7de152c9/61356348356.pdfIn PDF document text
    • http://rayhovietnam.vn/upload/files/nimomuji.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e6af0d0ad2d---33662772559.pdfIn PDF document text
    • https://alutat.com/data/file/56328467064.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/76834012256.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/jobobijuxas.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/vnmjp5i1onnib642s8emnaoni5/vivoxijubizovotapowifi.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/a82062a5fdffd5617571731dacda6907/bowamitalinixobifimura.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/12771715237.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/inhtfqn7jt07nodfnaen1sl7d2/woluwubovugufepugu.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/32475472017.pdfIn PDF document text
    • http://arabic.cz/ckfinder/userfiles/files/bumutidedamusiku.pdfIn PDF document text
    • https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/8a04ebfbdea6e0c4876aee54c9a439bf/pojubaxurejizuwivuramavar.pdfIn PDF document text
    • https://mirrorlink.com/public/files/files/35005415165.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/i2d6es7qvdh5g5iqsdfka0b4mh/sodozolokajidenutiru.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089f91482b19---77843869469.pdfIn PDF document text
    • http://erpsamik.com/ckfinder/userfiles/files/19189678416.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/obfvkjbbbkog91u2ufria8tgso/povazo.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082cde30eebe---gezowavixegetopulor.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF322 17360 bytes
SHA-256: 3ce98a8ef3cd178cbf77ed2f8bf12fa87af0682e9a087796a1b02bddd90d9d11
font_02_sfnt_off00012019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12019 10708 bytes
SHA-256: a292d3f99252ecc2ed3c9c3109075df3296bafb8e74073e2f43826b15848d393

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