Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9dfec68ca00ac68…

MALICIOUS

PDF

71.2 KB Created: 2021-09-16 20:16:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 18fc8ab085fd1d35c189d28d0f931fc8 SHA-1: 85ab1db9288ea158d358e961e960af8d015986d5 SHA-256: f9dfec68ca00ac68d37fe6077e9c25e605f49048537dec1602fdf48a16e9024a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which are unknown or potentially disposable, suggesting a link farm or redirection mechanism. The PDF structure and embedded content indicate an attempt to disguise malicious links, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fda31beac8---14324263193.pdf In PDF document text
    • https://ringid.vn/ckfinder/userfiles/files/13924816526.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/sobafuvuburogobizus.pdfIn PDF document text
    • http://sten.kr/club/data/userfiles/file/20210912203123.pdfIn PDF document text
    • http://weiken-rc.com/upload/files/63055824264.pdfIn PDF document text
    • http://htwy.com/upload/file/kiromatu.pdfIn PDF document text
    • http://bkdesign.ee/userfiles/file/2718856352.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/42506884876.pdfIn PDF document text
    • http://www.synagoge-stommeln.de/ckfinder/userfiles/files/jotuxoro.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/97718835713.pdfIn PDF document text
    • http://nuocmambason.com/upload/fckimagesfile/97ce109bc1da9e7d6cdc94664d0f7a7a.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/xumezirizivot.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/29951185452.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/woxakezi.pdfIn PDF document text
    • http://tianlanlawyer.com/filespath/files/20210914003630.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/e748190c3a406a69e06d5dbf3e4ecbff/japuzezomenuzisizalawubuz.pdfIn PDF document text
    • https://penmypoem.com/new/admin/uploadfiles/file/72814490835.pdfIn PDF document text
    • http://giadinhmedia.com/uploads/files/volonebuzevesa.pdfIn PDF document text
    • https://rjpexport.com/files/7706612756.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gujufojomor.pdfIn PDF document text
    • https://ourguarantees.com/userfiles/file/12137976386.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/28159278776.pdfIn PDF document text
    • http://ingpiazza.eu/userfiles/files/46314732692.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+update+android+on+tabletPDF link annotation
    • http://alessandrotria.altervista.org/areap/ckfinder/userfiles/files/39415413605.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_off0000b7ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cfe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE5 10536 bytes
SHA-256: bd729a965133bfad6a74b0187de8ab2f40782d533c448a0dbcbe629dfede20a3
font_02_sfnt_off0000e7b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B8 15376 bytes
SHA-256: 52fbe3666af85d8c49bd36cbcb8809875e3a18edd26dd6061a0b164bb319f1c6

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