Malicious PDF — malware analysis report

Static analysis result for SHA-256 469ad1222cade5e4…

MALICIOUS

PDF

83.9 KB Created: 2021-09-16 20:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6aec1918f30012c4a8e654d94a2778fa SHA-1: 312906dc9192b28d7429406d40f9eac593757cbd SHA-256: 469ad1222cade5e4271ee6e686888397073107c364d565e96ae8a12ed5ad2e3a
156 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links pointing to external resources, many of which are hosted on domains associated with compromised CMS uploads or disposable hosting, suggesting a link farm designed to distribute further malware or conduct phishing. The presence of these links and the overall structure strongly suggest a malicious document designed to trick users into downloading or visiting harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://myesen.life/userfiles/file/45277161603.pdf In PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8f9c6e767---fetegija.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/161391d64df35c---97120878580.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/161336d4fcf98b---zubinave.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/files/62749129158.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/jomoriwarazakufokewuginow.pdfIn PDF document text
    • https://living-stone.lu/userfiles/files/46160503949.pdfIn PDF document text
    • http://erago.cidees.com/uploads/files/nenipifibogevimewe.pdfIn PDF document text
    • http://slmj8.com/data/userfiles/files/78547196752.pdfIn PDF document text
    • http://photopuzzle.net/userData/board/file/ninoluwikafowip.pdfIn PDF document text
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/madusatiwafatejejiwilo.pdfIn PDF document text
    • http://cbcom.fr/ressource/site-image/files/fizugodugetixiba.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/26491134809.pdfIn PDF document text
    • http://gpp300.fr/userfiles/file/22873658122.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021090707221953502.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210904110919.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/jilaguseloni.pdfIn PDF document text
    • https://photojet.bg/userfiles/file/34933491823.pdfIn PDF document text
    • https://majubesar.com/contents/files/57153830369.pdfIn PDF document text
    • http://studiofapas.it/userfiles/files/21557545535.pdfIn PDF document text
    • http://linuxnewyork.com/draft/media/topepasowasodej.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/91250337664.pdfIn PDF document text
    • https://hk-delight.com/UploadFiles/file/pulewikenegovixumedisesof.pdfIn PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/44842297436.pdfIn PDF document text
    • http://bridgeonlaw.com/filespath/files/20210905180327.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=nes+android+emulatorPDF 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_off0000e524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE524 10484 bytes
SHA-256: 1e4ac396e4b94f1845f667be765eb1780a54af6bd9aa2bcd6fe71abd5b416f73
font_01_sfnt_off0000fcf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11508 17340 bytes
SHA-256: 1cccc77c7ca27a45c3d2f789561b414e35ec3d2d01bb02eb71933701a6fa552d