Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d07d26ad28d8bc1…

MALICIOUS

PDF

85.3 KB Created: 2021-09-18 00:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 7099210edb1159b51a5cf279ac107449 SHA-1: 670b03d6d790ad44f867de92fdeab7b6bfa4e1e3 SHA-256: 2d07d26ad28d8bc197e16459ff3d44651a12795da10a6078fa22c282be1ad7aa
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 that point to disposable domains, indicating a link farm designed to redirect users. The presence of external URIs and the 'link farm' heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://inwebjor.ru/uplcv?utm_term=waking+up+white+pdf PDF link annotation
    • http://sjccgy.com/userfiles/file/39696456006.pdfIn PDF document text
    • http://shippingengineering.com/files/ckeditorothers/33521188889.pdfIn PDF document text
    • http://toyotaquangninh.org/data/dulieu/files/mixekelep.pdfIn PDF document text
    • http://solis.altrodesign.eu/ckfinder/userfiles/files/filetajotesomavati.pdfIn PDF document text
    • http://ctmmaximoravenna.com/ckfinder/userfiles/files/208164610.pdfIn PDF document text
    • http://bfcy88.com/uploads/files/81089513003.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/7587383331.pdfIn PDF document text
    • http://greenworx.eu/images/uploads/files/65281926702.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/ligogile.pdfIn PDF document text
    • https://edouardweil.com/userfiles/file/jidimulupejo.pdfIn PDF document text
    • https://nslogisticservice.com/userfiles/files/namarufabapo.pdfIn PDF document text
    • http://abnicum.com/files/file/44104834960.pdfIn PDF document text
    • http://roosprommenschenckelfoundation.nl/userfiles/file/88269168180.pdfIn PDF document text
    • http://yugang360.com/upload_fck/file/2021-9-2/20210902005656724563.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/36417795668.pdfIn PDF document text
    • http://demenagements-remond.fr/userfiles/file/20210917121204.pdfIn PDF document text
    • http://thesecurityguardunion.ca/userfiles/files/komoduw.pdfIn PDF document text
    • http://agriturismolionsfarm.it/userfiles/files/zivejoxogegikux.pdfIn PDF document text
    • https://okud-istra.hr/userfiles/file/xofipubogoranexubosipo.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/12086085697.pdfIn PDF document text
    • http://marketingnews.fr/images/file/zagedivenukewov.pdfIn PDF document text
    • http://vilocom.net/webroot/img/files/95570622661.pdfIn PDF document text
    • https://mtmnetwork.net/uploadEditor/files/82418142611.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_off0000e638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE638 10616 bytes
SHA-256: b451fce821a8c9e4dd3785bc7c45be3188948edbf268f153e1822de5b4a31ac3
font_01_sfnt_off0000fe42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE42 19036 bytes
SHA-256: a92982f02278d9ba2bfeee4206bc64d23d2a521125fb26ef09c301078e2bd1ac
font_02_sfnt_off00012fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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