Malicious PDF — malware analysis report

Static analysis result for SHA-256 f15e9e311ca5ca8c…

MALICIOUS

PDF

81.4 KB Created: 2021-09-02 12:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 263f6624357e26c773e60e56f24f6cb2 SHA-1: f9afb644609f97b95d3615dad0b05da9d520d279 SHA-256: f15e9e311ca5ca8c03e1425921786245899a25dfdad8c226cda90c96af3b9e17
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, likely intended to redirect users to malicious content. The presence of numerous external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://laborke.ru/uplcv?utm_term=unweaving+the+rainbow+dawkins+pdf PDF link annotation
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/t6669i7gs29u6nb4vp5bgcouqn/99581896942.pdfIn PDF document text
    • http://ingpoggi.eu/userfiles/files/17281057004.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/93504260895.pdfIn PDF document text
    • http://orderkai.com/uploads/files/89383650738.pdfIn PDF document text
    • https://besteva.com/upload/files/29515472644.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb019b7824---vemoxenalotiw.pdfIn PDF document text
    • http://onestep-tokyo.com/userfiles/file/97517204438.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/695d67ca90d1bab6d85947031cab9f9d/80487030679.pdfIn PDF document text
    • http://fitviewer.biz/files/file/fexowe.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/16355455273.pdfIn PDF document text
    • http://hondatayho.top/img-ngocbao/files/78277045007.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607286ffd9153---74924442916.pdfIn PDF document text
    • http://inarchengineering.it/userfiles/files/63933397240.pdfIn PDF document text
    • https://erdemlerkoleji.com/resimler/files/luxagin.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef125ddecc---62524088860.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/nqsnbk5ns7iqh1f7dedkboioec/99753722779.pdfIn PDF document text
    • https://safetypadlocks.eu/eurostyl/photos/file/sabivagixudir.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4594f08f7---65169104320.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/lapavemoviwenug.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/2a927b66266250812a81f446bf568456/jurafefoxorad.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/61939151596.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/nunupurijusebim.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/tudoza.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_off0000d9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EE 11124 bytes
SHA-256: 4e3606a5efb54a84fcc8c9ea98e69ed24ce5bb23d71f9b1cdf7bc646f389ca83
font_01_sfnt_off0000f37d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37D 17040 bytes
SHA-256: 474a4e5901c890bd0ad9950be663ba498b69d07321990416b9fc1b1c6b5c33a5
font_02_sfnt_off00011faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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