Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a3a172c1c33a688…

MALICIOUS

PDF

86.4 KB Created: 2021-07-04 05:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: a649ef1f21567d11b07b5f3ecea5615d SHA-1: a57797ebe940364bdb8eaa6a5a0edbedc02cc882 SHA-256: 2a3a172c1c33a68886fe683439874655bf457b4cdb7c9572ae6e1ae3e36edaee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to direct users to malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or malware distribution intent. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://chcial.ru/uplcv?utm_term=the+standard+form+of+linear+equation PDF link annotation
    • https://allcreaturesinc.com/files/files/4239751361.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/ef68b0323db51066391db7e47bdbad6e/8427912353.pdfIn PDF document text
    • http://kookwarenhuis.nl/app/webroot/files/userfiles/files/872927844.pdfIn PDF document text
    • http://954move.com/clients/4890/File/56918621598.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/c1cad833e5427d2874f772bd16c18e0d/36541843947.pdfIn PDF document text
    • https://ahha.az/userfiles/file/24147839665.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/girilaxewolurowi.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/xitisutegerusitobofogo.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/50951622896.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/sejapafugigifavenoji.pdfIn PDF document text
    • http://busanpc1.com/upload/fckeditor/file/12329675224.pdfIn PDF document text
    • http://nature-revive.org/files/file/nigawewipitipirevilulida.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/b58ad754146c3ea4d78faed20dd54f4a/77979521414.pdfIn PDF document text
    • http://cukiernia.eu/upload/files/fujebuzojesosokaw.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/69e617594ab554b063c9f8bf25a48042/gubewemagoluxox.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6a82cf43c---jawimawijisewirudevaguman.pdfIn PDF document text
    • http://sehs67.com/clients/e/e0/e078d4d0076166a7bb489ca3b3a583ab/File/jezawajotosov.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b188623ac68---vubuxaxomiwipodorusonowaj.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/11261368743.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160827b950943d---muruwasuliveturopesori.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/u4vhspbpeao872f5ub8sack0np/kezokomovofiti.pdfIn PDF document text
    • https://ijpdua.com/contents//files/mabow.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_off0000ee58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001066a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066A 17392 bytes
SHA-256: 46158448dda2a95a18adcf768092b8b28b9d1ca2b2c4a74e5422550019870807
font_02_sfnt_off00013425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13425 10828 bytes
SHA-256: 7eec586d924bdad2bc2e1be7019ddf437a6217d95d22b1d3a2d0d263e45f3397

Open this report in the interactive analyzer, or submit your own file for analysis.