Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a7bab83579a8d92…

MALICIOUS

PDF

100.0 KB Created: 2021-07-21 08:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e14ef6e7e53edebd9c533495392c0518 SHA-1: c382925cce633832f7f427bf9b0e9a19ef2686ba SHA-256: 9a7bab83579a8d92d8d94d134df6d4241eaf8e088171f1e7d44c52d6ec727fbd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/81dc9eefe7e3a37ada0596961219948e/pazaguzitofemififenegejal.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160f6ffc20f8b8---61037135479.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607471d8a5d83---gapewuwofakojar.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/f732abc441cef6ad4aab5fa2821c8a9b/xaxawebobinana.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160722c8d2d0d9---45657937887.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/50027594f119750f910cfec8ad862500/9349062523.pdf
    • http://steps4cancer.org/clients/a/a7/a78c374070a178914b502abaf3db82b8/File/ripepun.pdf
    • https://moto-trend.cz/public/files/fck/file/64058175828.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a017bce5028---6219604769.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16094291737dd0---33093861994.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/8b095bb4f1977d3041638aa0e3858592/9009329760.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160f4ef0eaa52a---60207901790.pdf
    • http://citescolairedeledit.com/include/file/tijaroluselowuxogoxuduv.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/9fa65d781c08c08091e7afad6cd3825c/76481075767.pdf
    • http://psychoterapia-przemysl.net/img/userfiles/file/xuwaxewoxoxobo.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071bf21bba74---fowaruzejekevuparoxaso.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cbef21d4eb---xexixub.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095f7d55b31e---49854685233.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/07tilpmdmj3gn3d856nrghrab9/80076656254.pdf
    • http://emannsltd.com/userfiles/tejefado.pdf
    • http://1utilaje.ro/mm/file/91222792975.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/100becccb1db3f800dd3c2ece954b9ea/59286336759.pdf
    • https://alshaabcoop.com/userfiles/file/55736610004.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=scenario+based+sql+interview+questions+and+answers+for+experienced
    • 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_off00012305.bin
2c77fcdd69b89db89f9bb318aee959eaa68999addb818bffac66db2a1a0b5cc1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12305 17592 bytes
font_01_sfnt_off00014fe6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14FE6 16792 bytes
font_02_sfnt_off000167fd.bin
5394da67048c0a91e94836e821b8eec0108ed02afb08d8a47a125554893beab1
pdf-font-stream PDF embedded font (sfnt) at offset 0x167FD 11328 bytes