Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9fce6eabfc02f2a…

MALICIOUS

PDF

86.1 KB Created: 2021-09-22 13:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 590cef8ba27a0289a8c205cdf04f2c15 SHA-1: 96ffc9c8d8ee01582a417489fd079210591273e2 SHA-256: b9fce6eabfc02f2a792b315ad139a450ad3c75dd0b81c539c1e82b6516a77f8a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://philabc.ru/uplcv?utm_term=projecting+android+to+pc PDF link annotation
    • http://dailitara.lt/bites/uploads/file/xolizide.pdfIn PDF document text
    • https://dolaodong.com/userfiles/file/zadabagetozobuxalos.pdfIn PDF document text
    • http://immobilieninvestors.net/userfiles/file/nasufazuniwipin.pdfIn PDF document text
    • http://vietkinggroup.com/uploads/userfiles/file/mojokeje.pdfIn PDF document text
    • https://www.dooleysnaturalgas.com/ckfinder/userfiles/files/runumefusulasitiduz.pdfIn PDF document text
    • http://kfnmsz.com/upfolder/e/files/20210902170555.pdfIn PDF document text
    • http://laxycoffee.com/upload/files/zumenopavarajikani.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/38276413073.pdfIn PDF document text
    • http://hitelesen.com/userfiles/file/71572163442.pdfIn PDF document text
    • https://mabuksusu2.com/contents/files/23011370487.pdfIn PDF document text
    • https://semangkabiji.com/contents/files/fujowisinafovotifi.pdfIn PDF document text
    • http://caytrong.vn/Images_upload/files/walof.pdfIn PDF document text
    • http://bwemfjhjk.friend-match.com/upload/files/24274225816.pdfIn PDF document text
    • http://aokunoil.com/ckfinder/userfiles/files/potatagokavigupemikape.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/kowetimipupaxipijufi.pdfIn PDF document text
    • http://zzquansu.cn/d/files/jufexared.pdfIn PDF document text
    • http://alsace.annuaire-regional.com/ckfinder/userfiles/files/63628058759.pdfIn PDF document text
    • http://eatatrudy.com/uploads/files/94025900409.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/2d32c5bb1e7ea2c9c8a57f3000c38039/34765102532.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-7/20210907050231289419.pdfIn PDF document text
    • http://t-eamplus.de/web/editor/files/46781839458.pdfIn PDF document text
    • http://innotack.com/userfiles/files/konipagomup.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/161402c4e28dfc---834218890.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_off0000ec7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001048e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048E 17832 bytes
SHA-256: 2868967c60439c4fa7f3016ebc5e7e8697529171a307b0a5a10beacb33632422
font_02_sfnt_off0001328b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1328B 10604 bytes
SHA-256: dae1043281a22d67539652ae79caad52c53720fd5dab905cbb96e7980dd8460d

Open this report in the interactive analyzer, or submit your own file for analysis.