Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad96ffcb7c6f271…

MALICIOUS

PDF

104.3 KB Created: 2021-07-30 15:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 8d5239fb54d479624f8c2d6d6fc59e47 SHA-1: 43190eb698a66db058c2bbf8de307a8dbb8376cf SHA-256: bad96ffcb7c6f2710f49388f781e85fa2ea85a069e3529d589b653395a6f9486
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links indicate an attempt to exploit users by directing them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://crysiq.ru/uplcv?utm_term=integumentary+system+test+questions+and+answers+pdf PDF link annotation
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/b2eb1d5e84b28a3991ba3fc4e8ea1084/rawilowenodod.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/70758757454.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/famiwiwaziwerudakojefow.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/nakukogadesewosobaxojidu.pdfIn PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/55061024864.pdfIn PDF document text
    • http://solee56.com/ckfinder/userfiles/files/29563134746.pdfIn PDF document text
    • http://wuxihemei.com/ckfinder/userfiles/files/20210714_044343.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/vv17495t9jam7446bjkbek9f63/47522958847.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160af7e24339ee---57965755865.pdfIn PDF document text
    • http://peaceinsrilanka.lk/ckfinder/userfiles/files/93996073423.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/rusokevabi.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/98455942642.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/68nmupfmscdamoq9dajjf0alcn/nebamujobumizimivaseletex.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/e4f699cfa7ce8731109e6c23299d99ef/56007367720.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e38508c37db---80836900568.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f1eae9b3d---zukujuwivixalogi.pdfIn PDF document text
    • https://hocngoaingu123.com/upload/files/71733467485.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/cir773ba4ejupk561jjn0k8ae4/53722681740.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d488468bb6---13317132698.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082a4beedda8---14570094770.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/1d55ab134c1886333b3486d0d493666a/katoxavurukumobododux.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/14907654544.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_off00013312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13312 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014b24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B24 17308 bytes
SHA-256: c73269d9368b6469438bc2a746c02805065f0fd7badd0655ac267cff8de21ea8
font_02_sfnt_off00017882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17882 11192 bytes
SHA-256: 866c9f58eabc435fa43e58975fc8768da1b58b82251307cd6e22eac80d6a5ced

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