Malicious PDF — malware analysis report

Static analysis result for SHA-256 b02f9e4f6cdb6b14…

MALICIOUS

PDF

91.1 KB Created: 2021-09-05 16:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7a63e9b96aaf5136bb6ea62a92913470 SHA-1: 6410376fb561b4717609852b646120b03dcfcd53 SHA-256: b02f9e4f6cdb6b14346d94385fe45dfdc8aeda9627dba5601a1394a7532afe4e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://archism.ru/uplcv?utm_term=toyota+scion+tc+2010+owners+manual PDF link annotation
    • https://visualmotion.nl/uploads/file/83646395161.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a6968f187---jifinerisugakebozaduz.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/29449033188.pdfIn PDF document text
    • https://mfdesign.hu/files/file/15506799823.pdfIn PDF document text
    • https://orldoc.ch/wp-content/plugins/super-forms/uploads/php/files/p4bu8i4oc6rui9tjf5cl1alo33/pewunanevovamapiwag.pdfIn PDF document text
    • https://hunde-katzen.at/soubory/ripiv.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9eed198af---93127345365.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16070eba6cf812---zefodetokazopixaputor.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16071909e5e495---xegegamijinojolekewesi.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1141f2976e---fazapozene.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b68c8e7765d---lojofufonofisi.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/b3b04a654a9e2661ce27131ae8479775/9977950474.pdfIn PDF document text
    • https://grupo.iberia.es/js/ckfinder/userfiles/files/ruxusojelokapixoduz.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d63f40bec---22252685811.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/fagubiwozunit.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-07-16/images/files/93634535145.pdfIn PDF document text
    • http://goref.ru/files/file/kikop.pdfIn PDF document text
    • http://jhdljz.com/userfiles/file/1626421911.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/hn4aacr4b7leo28g9oe7giliai/97809059230.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/20216121817558506.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/5aa11abeef24167c7a1d6b9701e0fddd/76628824190.pdfIn PDF document text
    • https://cncostruzioni.com/userfiles/file/57256673953.pdfIn PDF document text
    • http://1976ahhs.com/clients/32223/File/71317442942.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/etcplu30lukt63qrk159pap5t7/35879712992.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/s6sv7c520kmon3vp1dhvcevoml/vejidapimixutovo.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_off0000fd32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11544 18188 bytes
SHA-256: 12e522f3befb4c1036c4f81539c5eff39d6a84298c896a48a981882477b3de7e
font_02_sfnt_off000144be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144BE 10948 bytes
SHA-256: 873af4b59aabcafe3c7fd42f07f8c26228e9d5be3c2823019a980f9241c975d8