Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9d2ceaa9079674b…

MALICIOUS

PDF

70.4 KB Created: 2021-10-04 06:26:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 4493125b03f61f74e688d81a013d9ffc SHA-1: 62f3ae80124eddbb7a5bddd643d9b03353e8b1b3 SHA-256: f9d2ceaa9079674b4ff5e04892b5ac51a4aa398b09fb93c5d9bfeb93cff44623
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content. The primary goal appears to be directing users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 https://krisoc.ru/uplcv?utm_term=business+implementation+plan+template PDF link annotation
    • https://pesonabali.dswip.com/ci/userfiles/files/nizivivisovulix.pdfIn PDF document text
    • http://cana.vn/uploads/userfiles/file/36516832458.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613258dc06060---nanupuzegovebadilibumase.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/lpdhp1mvcn9c3prcj9um3hdmf8/rigagod.pdfIn PDF document text
    • https://ostrichpharmaceuticals.com/userfiles/file/63136787963.pdfIn PDF document text
    • http://biosurfest.com/userfiles/files/17458825829.pdfIn PDF document text
    • http://kelsenator.com/userimages/pepiwoxa.pdfIn PDF document text
    • http://neoclassicalmansions.com/uplds/file/jevoji.pdfIn PDF document text
    • https://deepex.hu/hirek/files/65425281688.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/6db2a1c119a7efd82598530e6d7854e5/kebazajofejir.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/durunusidomip.pdfIn PDF document text
    • http://pretaporter-pegah.com/userfiles/file/negisumu.pdfIn PDF document text
    • http://ok-poland.com/userfiles/file/39833059158.pdfIn PDF document text
    • http://faceconnects.com/ci/userfiles/files/jubifupimuwusimi.pdfIn PDF document text
    • https://enkaotomatikkapi.com/depo/sayfaresim/file/37930832280.pdfIn PDF document text
    • http://www.grifin.sk/files/musakarotajufur.pdfIn PDF document text
    • https://komunalno-vrgorac.hr/files/rokidatutojenisutaxix.pdfIn PDF document text
    • http://oa30us.com/userfiles/file/duxijifemebegodun.pdfIn PDF document text
    • https://quizai.com/uploads/files/sozijekeboxuxilegiraxanad.pdfIn PDF document text
    • http://kompaspt2.com/contents/files/34553942760.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_off0000af90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF90 10468 bytes
SHA-256: c50e363046b76144372968c9a4f3bb4fc53203ebab9e0cb3ba7977c2e51ffc3b
font_01_sfnt_off0000c75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC75C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000df6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6E 18056 bytes
SHA-256: 8a81417b618fc0262109ac4011067144bf8e5e6cdff2aa200883700670f0a9a5