Malicious PDF — malware analysis report

Static analysis result for SHA-256 afa04d584a827153…

MALICIOUS

PDF

83.4 KB Created: 2021-06-30 10:12:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bb688fc7c0efb93286bb672107d7ceb8 SHA-1: 6b44654a36ca58b7dac067f63b6bd10fef465e9b SHA-256: afa04d584a827153d3d078bfecc4780a2b62594b2e28ee6291cc7204fb47e9b7
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to compromised CMS uploads and disposable hosting domains, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://allytemp.ru/uplcv?utm_term=bad+boys+for+life+full+movie+online+watch
    • http://nhuaduongnhapkhauaz.com/upload/files/4321516953.pdf
    • https://semsaesp.com/ckfinder/userfiles/files/46868336310.pdf
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160715b79465a6---guzutexajexurufowoliwo.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a652fbdf02e---30460914289.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a81b4ca1bdd---48012346338.pdf
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16094b1ff40a0d---figogaga.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789621740ca---fefamenofifomaf.pdf
    • http://lynxitservices.com/ckfinder/userfiles/files/3216513312.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/98ca623a9a2a58c9a0ae12f26f4f8247/zoketilefusedux.pdf
    • http://tlxzkj.com/uploads/file/200840413898.pdf
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/xinedebamixapopuwarodeza.pdf
    • https://sharadsangam.org/UserFilesTwo/file/39575876082.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a565c169c04---nijevulijozur.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a4908a1fd87---fujapuzezoxunox.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/c3a97ae7d88955c4da0b6148185197aa/28850872067.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4b6ae878a---55164965749.pdf
    • https://houstoncoinshow.org/FCKeditor/file/bikek.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/5a0tu50sfvoealrg0oeaf3tdf7/jezevewif.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a2703c364ed---36016182004.pdf
    • https://alakharia.com/public_html/userfiles/file/94742029127.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e9c57204e---55898317733.pdf
    • https://aulacvn.com/upload/fck/file/wajenimepufixodizek.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2b864239c---10914778125.pdf
    • https://bamor.org/userfiles/file/59760743563.pdf
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/55231005900.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/e56dafd40544b83387db718b8829b1f5/vivafimuluwowit.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/6652f1bab3f70b957ff0663977dc6b7d/79531539634.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/e83d1d7fd92e3cefe67bc5357724119a/30415408.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_off0000df99.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF99 16792 bytes
font_01_sfnt_off0000f7b0.bin
018dd0ebd428dbc97970a79c00f863e9ceadab540fd50b7fbc48a4d544851498
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B0 11300 bytes
font_02_sfnt_off0001121f.bin
9e96230ede7b9fcbd06a64b16ce2f690d9a747164611ea0e3a2eabafb5cdeb83
pdf-font-stream PDF embedded font (sfnt) at offset 0x1121F 17628 bytes