Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bce45e7e96624e7…

MALICIOUS

PDF

87.5 KB Created: 2021-07-03 19:34:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d711de8d059d16818a4553386f88a6d8 SHA-1: 3bd1a432153d054cf06f4b966966c81b9b253b4a SHA-256: 3bce45e7e96624e7d7c1f91795736555694ec4ecc6bf84aff17ce835ef7a4b96
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, detecting it as a phishing trojan. The document functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting. These links are likely intended to redirect users to malicious sites for phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://tamker.hu/userfiles/file/tuzepawufowadeb.pdf
    • http://quaretti.it/userfiles/files/nokuzol.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1ed78e17a---46160304397.pdf
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f3eae7a6d---tujufixox.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/mb4i8d0qbku2su77mhsc428ul0/87881359929.pdf
    • http://from.ua/upload/articles/2021/06/21/files/61047925095.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4ec907334---19750969085.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/896734a96b4c4ffd0d2550be906e1871/37739467866.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/c898d55dae85d74e3ac87c14379b136d/pisigisujibotuzuk.pdf
    • http://lawngo.net/fckfiles/jifololigesojuxetepix.pdf
    • http://cayxaotamphan.net/userfiles/image/file/64027292963.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c25a056fb2a---gupafirokezalilu.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160c50d51c4f1f---gojemagewibalojatawedow.pdf
    • https://seikico.net/img-tym/files/wuduno.pdf
    • http://massageindex.nl/images/uploads/71982099422.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/3d2cdd02230b03383f64bc0dc501b0a4/56517954765.pdf
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/cm90jah4f2hp3khsbvjed27qau/4298727252.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e7e724f41---46894386180.pdf
    • https://nothingbutsafetyglasses.com/userfiles/file/77172132934.pdf
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/bb482d850bec90089e672f22440d4367/8666622868.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c7c912b8f---36793533233.pdf
    • https://rowadalbyt.com/userfiles/files/kakikoberifeneruvo.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b4a7833ef---sasuliluvomofopofudakib.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=the+pirates+bay+list
    • 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_off0000f48c.bin
125791b9fadeb450978f25ba3e5a92fb2603dcfe01193d0d2f9d225d155bcb89
pdf-font-stream PDF embedded font (sfnt) at offset 0xF48C 10344 bytes
font_01_sfnt_off00010bd7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD7 16792 bytes
font_02_sfnt_off000123e9.bin
4f6b41ec59149117c307201cac6990065fa66808ef1c37808a805240ef129ca0
pdf-font-stream PDF embedded font (sfnt) at offset 0x123E9 17376 bytes