Malicious PDF — malware analysis report

Static analysis result for SHA-256 796d5637222122d4…

MALICIOUS

PDF

94.6 KB Created: 2021-09-01 17:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a5ce1f00d472001dc51eafd8eb323e3b SHA-1: a36a1d72b46366cece302e3f38dab2463343f9e2 SHA-256: 796d5637222122d47f3bbb51d072fadc18f53ea46df0aee95314972fe65fb206
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution lure. The embedded JavaScript likely facilitates the download or execution of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • 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.
  • 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://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/d0a26022d375ca477d4ce742ad77fdcb/dipejibufiwevurapawaju.pdf In PDF document text
    • http://botosani.ro/img/uploads/file/jazuwapanumukimulom.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160867650a80cc---94385284352.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608fff0dbfd87---xovasuko.pdfIn PDF document text
    • http://wrhsclassof82.com/clients/d/dd/dd94ad2327da436b0bfbe5937c3cc641/File/9981057654.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/63342224041.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609522b73dc80---kenojiwijutugajimup.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/7fcngp18d9baf69vfmn7u2pm1l/44899378967.pdfIn PDF document text
    • http://amandamaitland.com/images/file/40841980380.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/7f379ce23a7a20635c45a94039e1ccf9/getisugolor.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b1f4d5d88---xifubogekinageliselake.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/6907565706.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/q6d3kl6h8g41ll2094oqotvbf4/sevuvufed.pdfIn PDF document text
    • https://moraure.net/js/ckfinder/userfiles/files/fizom.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609426d54faf9---57964034584.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/rd36bfl9rkki54q0c55tu3o7br/wixonosanasan.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/610e70a0880ae.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/2tvneblrcvs9ubhg26o9g5iovb/70868946743.pdfIn PDF document text
    • http://cioccolatogallucci.it/userfiles/file/wipudepulofa.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/livaposerivoxogufepak.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/fc313c138cde63575bdd471bc507f04b/70875903948.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/xevigu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=a+course+in+power+systems+by+jb+gupta+pdf+downloadPDF link annotation
    • 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_off00010557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10557 19192 bytes
SHA-256: 998f7ea34036b52a49c7866c692bd71c8344046af096d893f7c0fe833fa6ab27
font_01_sfnt_off0001383f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1383F 11512 bytes
SHA-256: 8b8773c66d34e4e78a96f5e2c857b21e63925f482f2c131725e05db2a101d674
font_02_sfnt_off0001532d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1532D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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