Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d7294ee09e9b41b…

MALICIOUS

PDF

75.2 KB Created: 2021-07-07 10:08:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 26d667fba9f02198c2e5504e9da7e58e SHA-1: 1901a79baccac86660cb16edc2bf7bc9701baccc SHA-256: 6d7294ee09e9b41be9793d0cc93baeea75034a68ef204b63c3643a0bde708b2c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF sample was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the presence of external URIs and the nature of the heuristics indicate a likely intent to exploit PDF vulnerabilities or trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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=schottky+and+frenkel+defects+pdf PDF link annotation
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/8e30525c1e69f8eff4de473029bd5138/borogowalorova.pdfIn PDF document text
    • https://hw-power.com/uploads/ckfiles/files/60dd9a0024268.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/cvmu7aod0ghug4f5o8ngiugj3m/12793823289.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/59200573203.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/r9kfvhir4l8mbhioiigb96uuqk/98504268585.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/482af140bef290d9472d1311a4009787/rifise.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949e811f314---32854445750.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da658d01238---92629411751.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607578961a84a---61413517351.pdfIn PDF document text
    • http://ausafe.net/images/art/files/dolazeb.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/r2b7d3toku4of8u079flovrte9/ralititadinalomuban.pdfIn PDF document text
    • http://muacuoi.vn/Pictures/files/53717876408.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160abda61cd624---neferora.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/87052945458.pdfIn PDF document text
    • http://dzbnf.com/upload/file///jukoruperogujovagijuzomi.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609439f47d1dd---38746635116.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/76833071404.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/3081405878cd8b49b479c414a1c97bb2/1344351256.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608cfe1978176---gumefenusenidavugasivef.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7bc696a595---70771924981.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/e049280ac8f52b4ee648b754ccc2be91/zajizibonab.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1624653734.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_off0000c4da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dcec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEC 16164 bytes
SHA-256: bd919ceea4f56b79da95af45ce6ff574392e3e6a5d0c345db20054258aa045be
font_02_sfnt_off00010698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10698 10908 bytes
SHA-256: 9eee31c04f75fcce80b1263da1a6666eb5a0aba7b4574d1352c0d06d34df1e10

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