Malicious PDF — malware analysis report

Static analysis result for SHA-256 963eebb365a696a0…

MALICIOUS

PDF

93.3 KB Created: 2021-07-08 05:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ba9ed57cfa32ee54ed057b70ce694bf9 SHA-1: 1331b63d3bdbdc32283e0d3a5c1656488e219445 SHA-256: 963eebb365a696a0a9d9b185d5549803fe3b73b5bb8b1764e1ed2e26faa32a9c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the structure and numerous URLs point towards an attempt to lure users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://garglob.ru/uplcv?utm_term=ronnie+coleman+arms
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c949724ca4---84051818464.pdf
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/8ae450fcf7e26a7570a72c1f27f2dc46/lakunijitiwezizokenenoje.pdf
    • http://herculesestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/robiragitoramabapulejef.pdf
    • http://kursadowicz.pl/Upload/file/vajileleteburixeva.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d458721fca5---22283760598.pdf
    • http://soundreaming.org/wp-content/plugins/super-forms/uploads/php/files/36305f12616c46d787cbdd263b016f8c/rozonagola.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4c933f36f---luwijisonag.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070704f1b7b5---35131637037.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16076dbb5a4051---18539380928.pdf
    • https://immobilgold.com/file/82183269407.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160831050067f6---dinutanasivoxez.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6cbe343e2---33829281721.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16081c629614b7---48408595951.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d88fc385bd---18025441321.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c20407b2470---vasuwekawol.pdf
    • http://ajtoablakcentrum.com/_user/file/toxemedazodujojevu.pdf
    • http://abpaluso.com/upload/file/xesijusiwenojudokeboliwak.pdf
    • http://clarksville.net/wysiwygfiles/file/bozeduwupesivanumenud.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/jalho29r2f6pk5ahsapu64guc6/kedutewokawuxuguwufogem.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd5a4e6f8a---17974164769.pdf
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/e5de32a241120803f4864e036628d4a3/puzasenetimanov.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3cf5cb794---gokegow.pdf
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/cc9cb5c777be7d178ea400a7c1513d8e/52716593015.pdf
    • http://ridendo.cz/files/file/favitujizomeruro.pdf
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/dulamijezopekek.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8df44cdba---20174459066.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001089a.bin
ffcc97d53efbf2c130e620d8e259fec3dee5e1f7d3d87b60c178c96d6c9f9889		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1089A 17828 bytes
font_01_sfnt_off00013742.bin
c3ed1df7394310a728fe05f02127fabaa8834a059c0c9eb4516720b3615ab16f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13742 10336 bytes
font_02_sfnt_off00014e85.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E85 16792 bytes

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