Malicious PDF — malware analysis report

Static analysis result for SHA-256 06961085c93ce61c…

MALICIOUS

PDF

99.2 KB Created: 2021-08-14 21:04:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3b5d6b2a287468d6a06d739fa85b1069 SHA-1: ef5d6cfa77b9486cd711115e814713b2f36bc1d5 SHA-256: 06961085c93ce61c757d8b92dadac6e3ea1678683691e737a3b9357505466b48
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to numerous unknown URLs, many hosted on compromised WordPress sites or disposable domains. This suggests the PDF is designed to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://selltoob.in/ci/userfiles/files/94071858131.pdf In PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/a4613351ebf96de93e1535a56468ecc4/votukosagowa.pdfIn PDF document text
    • https://toromecanicorodeo.com/files/48554878330.pdfIn PDF document text
    • http://czytamzezrozumieniem.pl/userfiles/file/30371649913.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/16741772635.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/banoziwedigiraxanira.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b27801bca1---70498724549.pdfIn PDF document text
    • http://cdhsalumni.com/clients/28864/File/gazotufujemavi.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/fe8a08b0a2173df3b6bfbdee845f08d3/ronibidanarometuwoz.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9cf4d24b9---3499760257.pdfIn PDF document text
    • http://randalljroutson.com/clients/44711/File/33591223213.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/447e26e677f3a1b7e787edc767de8ed8/zeneja.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/82338350654.pdfIn PDF document text
    • http://builderall.info/userfiles/file/desiganozesenexat.pdfIn PDF document text
    • http://hornets88.com/clients/56662/File/zoliriv.pdfIn PDF document text
    • https://www.bramfordgc.co.uk/ckfinder/userfiles/files/47832331425.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/ra11a8o00rikln0lmkooffbk1o/duwajilekiguwobifija.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/680no8hmmssfj8msrd2eas0517/nametotunava.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608078042d965---nogexeki.pdfIn PDF document text
    • http://library.nesdb.go.th/ic/admin/ckfinder/userfiles/files/bumubuvulezezevebin.pdfIn PDF document text
    • http://candientushinko.com/images/file/98558106811.pdfIn PDF document text
    • https://handientu.vn/userfiles/file/kujari.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/37c20e83c11aa0d8cb79c710ae93dd73/lagozumijusikipojud.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609453cd0682c---pipezixamadaxivakab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+make+water+texture+in+blenderPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/94f5331357e373332518986d79ae3286/zosatunes.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_off00011e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13697 17504 bytes
SHA-256: 7efd68311924e2871f9a03a1c537ffa46677146edfcded908123f7ae378418ac
font_02_sfnt_off0001644a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1644A 10752 bytes
SHA-256: 928b51175cca8717daf03ae1f5f27186f9a9476ff0f5cf252c2f412c33d0eb39

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