Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d6682106b228765…

MALICIOUS

PDF

84.7 KB Created: 2021-07-02 15:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: af446cb9efea812578d2a88a6b9748a3 SHA-1: d13daecd7903932717e887b78ae5d7af5622c695 SHA-256: 2d6682106b2287657bec35ff2c7103d71aa2d9f35eae25294c33d6c420f495ca
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress upload directories, suggesting a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of numerous external links, many hosted on compromised sites, is a strong indicator of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • 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.
  • 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://monkey-do.net/userfiles/file/55088333462.pdf
    • http://airconbank.com/upload/fckeditor/file/10959036681.pdf
    • http://clear-es.net/yamituki-n/uploads/files/zezulajomanafinafor.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16085861abccf1---muritixeledudojozakomarop.pdf
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/45b6df31ba620481eb36b5bdad54deb6/28299528362.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e7116cddb---5060209509.pdf
    • http://vienhung.com/webroot/img/files/votidesepezedigolumivif.pdf
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a4291f748---86528806109.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16079f228434e1---giwakepuweve.pdf
    • https://baoholaodong24.com/userfiles/file/kanolanezivewivujuw.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a51804e3db5---97477060592.pdf
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607746af1fef0---28089926127.pdf
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1609861699d9f3---93638800771.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/bbi98a11f09o1gtvnr1nujpof2/tadalivomisakis.pdf
    • http://supermarketdv.ru/files/file/95798913141.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/3d0bccd344ef817f7c066b4911404d8e/28587878604.pdf
    • http://thingsantiquesla.com/userfiles/files/gowilafuvofibekenikanow.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf99012ede---wafevexivid.pdf
    • http://adance0112.com/upfile/editor/file/32555634488.pdf
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/tfvfms9pv8o9deor09fnnqn6se/lasobasarujazekisixew.pdf
    • https://pharma-tools.eu/galeria/file/zaliruxomusuz.pdf
    • http://446888.top/userfiles/file/24295583283.pdf
    • http://uniroll.pl/user_images/file/potidowagefamixidor.pdf
    • http://novussiteyonetimi.com/uploads/file/tutarerin.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=how+does+uni+assist+work
    • 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_off0000ea09.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA09 16792 bytes
font_01_sfnt_off0001021b.bin
b24b514a77d62da66f0e04abc4e6e31a7e5762ed0d4cddd22d66a45ee937786b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1021B 16744 bytes
font_02_sfnt_off00012dc5.bin
3c616c663081a2fe517ddadbbf729170ef7290240cf8e9cbcfbd500b900d2808
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC5 10464 bytes