Malicious PDF — malware analysis report

Static analysis result for SHA-256 fafd36d6e02922ff…

MALICIOUS

PDF

75.6 KB Created: 2021-09-28 22:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a34827805f4317f6e0388b5a8a0a6ee0 SHA-1: 7ee791f01ceda839f4368ec9a594acfb67759633 SHA-256: fafd36d6e02922ff2c182bd323ad01756552360fc9f3d6dcf37a2ad4a9a3ec76
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a significant number of external URLs, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent, likely involving the execution of embedded JavaScript to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://cructi.ru/uplcv?utm_term=missing+your+boyfriend+quotes PDF link annotation
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/62693650861.pdfIn PDF document text
    • http://hangtatmj.com/userfiles/41230230597.pdfIn PDF document text
    • http://servmed.net/userfiles/file/62003526958.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130a2a649142---jedawixorafidujupibedak.pdfIn PDF document text
    • https://sadex.pl/fck/file/xinemugivifogu.pdfIn PDF document text
    • https://ntc-container.com/upload/files/xosiponekukagiletebe.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-9/file/38525299517.pdfIn PDF document text
    • http://dubilex.com/userfiles/files/13686247448.pdfIn PDF document text
    • https://ecoolteh.eu/galeria/file/53698475083.pdfIn PDF document text
    • https://pgp-puh.hr/fck_media/file/wirizufizabaramutoju.pdfIn PDF document text
    • http://chi-kara.net/Upload/files/buriv.pdfIn PDF document text
    • http://pitin-akutsu.com/js/upload/files/37507547242.pdfIn PDF document text
    • https://motoralbini.it/files/file/65966812418.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/9c6127b8a112c32d9905fc281b9233b8/53205480451.pdfIn PDF document text
    • https://mayxaydunghoangphuc.com/userfiles/files/94155248337.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/mukavebot.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/161325d8b18c7e---zivozex.pdfIn PDF document text
    • http://riph.pl/userfiles/file/fefajinenixovetexed.pdfIn PDF document text
    • http://hcbarrett.com/user_area/file/jetikogenimegu.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614749d9ddb74---mibadaz.pdfIn PDF document text
    • https://elmaga.lt/components/com_mijoshop/opencart/image/data/files/75558540673.pdfIn PDF document text
    • https://ofcourselc.com/admin/uploadsfile/38516808323.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF2D 16660 bytes
SHA-256: 08d0860eb1783abfc24bae3c40f35a08d37d2fbf73b630a118d33e80203b2944
font_01_sfnt_off0000da02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA02 10812 bytes
SHA-256: c5124c1b056927d2d803b59a37ce6b5affb51c1da04d08361b1aa8b50da172e6
font_02_sfnt_off0000f296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF296 16232 bytes
SHA-256: 01cd0e4798e93fb086042d610f43ddeed7bf091af48aa863f5c4a4f61b651684
font_03_sfnt_off0001086f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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