Malicious PDF — malware analysis report

Static analysis result for SHA-256 0900589b843c9177…

MALICIOUS

PDF

82.6 KB Created: 2021-06-30 23:37:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: bdba8e4df2983a08a777c273ae37b9f3 SHA-1: 537725729cb27938502b90c5d3b1470d67cda894 SHA-256: 0900589b843c9177ec2908a4f5c1532297f2dd6571e30793d61e4c40311f70f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content or phishing pages. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crysiq.ru/uplcv?utm_term=imperial+measurement+table PDF link annotation
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16077d85810ed4---bexesogopepoma.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607525e5619c6---24669048130.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/8lq4eqnnung63umeoki1j9chkm/93249184539.pdfIn PDF document text
    • http://stpetersame.com/clients/9/91/91902b33218228c9a3691be2563b71f1/File/46294457598.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/48693440805.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c38ce971272---vewimamis.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/99dd2a1a4ae2a3dec67cca5a6dcb94d2/56917894437.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16098830184264---36851092858.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607a579dd5601---tibubobojex.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a9b5a1adc---lubuwunadozozobibuv.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8eb410e88---ribiwawu.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/59f887f598eeb264d769a967dd1b4a53/fazapul.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/m8emm0g0ob1ll9i298umr1305v/keworimopuj.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/459a7c34b55a4b946534b21e8cdf0d1b/46695493144.pdfIn PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210629_CA20F029E229D752.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/p141ahkmr5f839jbfrfaq2knc3/70395532636.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/77896209396.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/955f29b4ad8d99c117885313b72c95ac/kepibifidaxim.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b054080f910---navepidoxilu.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839861b8a23---67798156560.pdfIn PDF document text
    • http://clairvoyantinfotech.com/demo/images/kagijet.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_off0000e0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C2 17224 bytes
SHA-256: 202ee9a25bd84223b63e72c1a39d82af4e0489ed22a2573e27abf986f2218b1c
font_01_sfnt_off00010df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF6 10484 bytes
SHA-256: 014f4e42f2c206d3a99929dddafb91552891ddb89b49905e3a3a23a04af71a75
font_02_sfnt_off0001257c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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