Malicious PDF — malware analysis report

Static analysis result for SHA-256 7080f5e0e609d347…

MALICIOUS

PDF

88.6 KB Created: 2021-06-29 12:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6ffb76c52820c447aaa0548ee63ce5c1 SHA-1: e20c6a1374381693383eb37b26ebfaf04d11cf7f SHA-256: 7080f5e0e609d3470f6b219368b06f73ebf8cde2fb972d790f0a0525ad2d80da
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the nature of the PDF and its embedded links point towards a tactic of luring users to potentially compromised websites.

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 https://medvor.ru/uplcv?utm_term=harley+quinn+project+free+tv
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/ba1f2ed06e55c04bc551986ed3a43f94/97273470803.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/db99674bd960d46a03ce78a887186737/73369162001.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160984b3a0efa0---fadadajafasadi.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d15220c419---nanivuzemovofipija.pdf
    • http://alexhoffordphotography.com/temp/files/file/41862010840.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/bsamegogevqegtj9l7e4vdq566/fulikinukikijoned.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccb4898fe1---51417081238.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c53ef985b7---zunin.pdf
    • http://barcelonasixtytwo.com/userfiles/file/54287082532.pdf
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/708af6c11e643ea6a9b0e8cde29b4d97/tewuwunotokunezufaguwigo.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/f1f7b918bc52c8d66317aa2599e660d2/milupilujuzumofajute.pdf
    • http://ibiforstarlight.org/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/88002055756.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/bd435393b36f67cf7770ade6df6605f0/wukoledonotipesagavunu.pdf
    • http://statewideroadservices.com/clients/879378/File/33584357151.pdf
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/46358771273.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b57d08085cd---lufon.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/b558bb847788fb054f525319554b937a/zedizapazomemafovide.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855df4e358a---votagudizejaruke.pdf
    • http://atenngo.com/admin/sites/site/documents/kuvutepadexemorirakuru.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b26ffb44668---wisevudat.pdf
    • http://dzstock.com/Upfiles/file/sobapumawux.pdf
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aac08ae3cc2---40696057706.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc0f34c8ac1---vasilawebadimavunamaj.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_off0000f5f4.bin
c39891dc6eba0b7a2d56f84f4a1f893bc7558cc82b38d69b32fc0a3113015131
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F4 17200 bytes
font_01_sfnt_off00012282.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12282 16792 bytes
font_02_sfnt_off00013a99.bin
e7a8c87ef89d8a0bf3f3befd1b382974d079b2635186f07572b7f4ce200a59bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A99 10852 bytes