Malicious PDF — malware analysis report

Static analysis result for SHA-256 07a3681612642cfe…

MALICIOUS

PDF

73.5 KB Created: 2021-06-27 06:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: da00f1c5c46b669d0314fc5be7125cbf SHA-1: 1fcf2099b10c7b8df38bc6ed26ac3d7b59601c53 SHA-256: 07a3681612642cfe2d3c120f39b1e1b72b57bf18bb48dd56e8837434998c5b3a
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The presence of a 'link farm' heuristic and ClamAV detection further supports its malicious nature. The document body is unreadable, but the heuristics and URLs strongly suggest an attack pattern involving redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=english+sura+guide+for+class+10 PDF link annotation
    • https://crownprolaw.cn/userfiles/Proj_Name//files/18808462372.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/9641a9c0af9a3c57808cc6ac6d7bfca1/82968358965.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/33077321213.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c7452061131---81508652615.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/foxibaxabadijog.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1608711011a1a5---26520792500.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dc2c949a01---xitemuzozukuxe.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97dd65b0f1---95160765587.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/0eaf2584f4dbd2ebf46e1a9d28d97178/refon.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/53600303079.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/ac9bb051b79b496e2d267547d2feedab/bebesuvokomamububutik.pdfIn PDF document text
    • https://mytopics.it/uploads/file/mukewevojegaloseb.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be1426d207---92012435989.pdfIn PDF document text
    • http://thomas-reunion.com/clients/8/86/86f5f051d314e00f57792b8428d7085d/File/dugusozizerimadadimu.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160919dbb14353---36636788917.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/votutota.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/366236823609306b0b902f.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/volalumumurubatax.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072bdb71abf2---37147435540.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/17138356085.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/95d4e76462df1d41e5b013485ad18783/fozekiw.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/585bfa547e344e8cefc978e7c9183190/kudokojefusakako.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/93002646ae16ac37710b5f67c199d7cf/xemidikikumevolupis.pdfIn PDF document text
    • http://suncitygroup.ir/basefile/suncitygroupir/files/xevuxijuxawoxometus.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/89385025712.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD635 16016 bytes
SHA-256: b95e231b105ddec3b1335856a2df7c7ef3ae3075280dc00ad549a28da10b977c
font_02_sfnt_off0000ffb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB8 10912 bytes
SHA-256: 618c8179e2d060220eed20b1dd48c6ad58f0e5cc78e075b05d4e78f3701ba1e4

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