Malicious PDF — malware analysis report

Static analysis result for SHA-256 c63f069177071d6c…

MALICIOUS

PDF

100.5 KB Created: 2021-09-04 04:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 97e17554f5e88b45030f68243515bce3 SHA-1: 610d3144ccc574a128f612f9c8bd6926073260cb SHA-256: c63f069177071d6ccb8eb06889ce8971c7f93aaf11d6171c28379eeab8594f2c
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous links to external websites, many of which appear to be compromised WordPress uploads or disposable hosting, suggesting a link farm or phishing lure. The primary purpose seems to be directing users to these external sites, which likely host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://cructi.ru/uplcv?utm_term=biomechanics+and+kinesiology+of+exercise+pdf PDF link annotation
    • http://myarrahnu.com/mo_images/files/94917923182.pdfIn PDF document text
    • https://rajatotogroup1.com/contents//files/6094349999.pdfIn PDF document text
    • http://pzhjintai.com/upload/files/kawezozoweludonifodom.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160caaa37a21b8---kazevilik.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/77170538246.pdfIn PDF document text
    • http://cfacgroupe.com/uploads/FCK_files/file/dezuzanelosakisigirifo.pdfIn PDF document text
    • http://ayhancevik.com/images_upload/files/nekotawi.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc6d04d9cf---jevafij.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c488465baf5---lutizemitefukurobof.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/67855911861.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/a5811463acaa1a23e31dbb097e56da25/zasosigiwi.pdfIn PDF document text
    • http://orlickachata.cz/files/files/46991730640.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754bf87de8e---31924938966.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/nevax.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079ae5f17870---5308247526.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/54619896711.pdfIn PDF document text
    • https://interconformity.ro/images/file/35852870552.pdfIn PDF document text
    • https://network-italia.com/file/veduzelemupu.pdfIn PDF document text
    • http://pritchardreunion.com/clients/81409/File/32421589572.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/4cc3ca267e84019a158e2da1b2aa80ac/lowura.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609609bb61013---89712275081.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a55bd3738e1---jalijuzisewo.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/a0d6783b3fe92ec29aefbb03c2f9f440/pataxexafewe.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3C 19552 bytes
SHA-256: 5ee27a0ca3b94549c42a9a9816c3c3820e1ec1dd9b548ddd721b502489bdc74f
font_01_sfnt_off0001519f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1519F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000169b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169B6 11328 bytes
SHA-256: f0872160c2d9e887b3ab3c6fb90868c87a01fce6daa4a3ff6bec2091054b7c29

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