Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ae31eb22a7a59c3…

MALICIOUS

PDF

75.5 KB Created: 2021-09-05 14:50:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 591cdf17531427b308c9d247a5a2a821 SHA-1: bcf1d74a01dde99e734334e037036840034f9453 SHA-256: 1ae31eb22a7a59c3ad54e98a2e606cafffe91d929cd966fc94c57fc9f8d168b5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous URLs, many pointing to compromised CMS uploads and disposable hosting, forming a link farm. These links are likely intended to redirect users to phishing sites, a common tactic for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://ketchas.ru/uplcv?utm_term=mi+lifestyle+marketing+business+plan+pdf PDF link annotation
    • http://thevisionkharj.com/userfiles/files/begexufugotakoguzir.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/cb43c1a6e1a86f88bcf01012e529ac66/joxobuzovozexix.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/1748c6bc85fc658669613f480f7ce0e3/gasidiravi.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/42128467774.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c6edf6ec919---59310265390.pdfIn PDF document text
    • http://nzozkrowodrza.pl/uploads/editor/file/sizepotulelorotukujemefu.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/2adg8j11ctaf9gtvujbjipdrr4/90357667958.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5cf7034682---todejevegusopubaxemomes.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/37tsv6iq2o9baguv2e5i5v2mpt/wawikanadawuvud.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b8418eee8---26674110464.pdfIn PDF document text
    • https://i3mit.com/shopadmin/upload/files/woniweruzi.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/76686715229.pdfIn PDF document text
    • http://mdtrend.hu/files/file/mibanabotiwovutoj.pdfIn PDF document text
    • https://chezgregoire.fr/userfiles/zonusop.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/1dd2a2f94786505630ad8c32fe4920e6/95659861646.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/92364893241.pdfIn PDF document text
    • https://gujaratisamajparis.org/upload/files/83288304831.pdfIn PDF document text
    • https://roomart.uz/ckfinder/userfiles/files/xamolu.pdfIn PDF document text
    • http://groupementpecheduloir.com/ckfinder/userfiles/files/puvub.pdfIn PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/gasapitemowag.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/95817687819.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9f7a9e624---firow.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/60580217116.pdfIn PDF document text
    • http://kbcsisa.com/upload/fckeditor/file/jiwoxivigakuzivexe.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_off0000c0ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0FF 11160 bytes
SHA-256: 15953beb139c98dd53b322176418a2f7aec3f5db6b07057849776410673f8c2f
font_01_sfnt_off0000daad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f2bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BF 17644 bytes
SHA-256: 999a8ddd09e1e395ea6ec1474e3aa87898720d7b6d376d4a089f6853de2c12ed

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