Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d79edaceca5fd7f…

MALICIOUS

PDF

90.1 KB Created: 2021-09-13 21:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e53efbb6041904bd0b3a763fd38ed9f6 SHA-1: 362aaafe67bf6b74e16a4e1523e19eab1668fd3d SHA-256: 4d79edaceca5fd7fa6347a2f4370303116cc03f3ae4270013ef13d427e59e832
126 Risk Score

Malware Insights

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

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, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document's purpose is to host a large number of links for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://cbconsulting112.ca/userfiles/files/seruwe.pdf
    • https://cplastik.net/data/cms/file/razegidazatanal.pdf
    • https://nacituran.com/userfiles/file/jowisotojuvimam.pdf
    • http://preciz.com/uploads/wysiwyg/files/lisinomo.pdf
    • https://tomas-music.com/contents/files/65012398525.pdf
    • http://chrisdepanneservices.fr/Sites/cds/files/66897346136.pdf
    • https://conviviodihera.it/dati/upload/file/jilokupivavesog.pdf
    • http://manpukulivermore.com/uploads/files/9966610467.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5ecb02a0d---vazezu.pdf
    • http://elektrostroy.kz/ckfinder/userfiles/files/fuparuvokefufabi.pdf
    • https://betalinktech.com/blmedia/file/pelovegiju.pdf
    • http://sfipl.in/userfiles/file/virebisujuzomegizuzagexe.pdf
    • http://ilturismoinitalia.it/userfiles/files/memomatebabijanunetilitol.pdf
    • https://piauiaqui.com/ckfinder/files/7082013977.pdf
    • https://interference.ajoda.eu/userfiles/files/96215694315.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/161319db1ad90a---19192499982.pdf
    • http://gymostrov.org/gymostrov/userfiles/file/gipubu.pdf
    • http://mdtrend.hu/files/file/pejapewemo.pdf
    • https://hondaotohaiphong.vn/upload/files/rejumefotifujepevijate.pdf
    • https://latrinquette.com/upload/editor/file/fopuginenapori.pdf
    • https://costabravas.com/uploads/localidades/files/fulogojakixenogozexosubu.pdf
    • http://www.ctmmaximoravenna.com/ckfinder/userfiles/files/93429304956.pdf
    • http://soyaksiesta3.com/userfiles/file/kufaj.pdf
    • https://tbsva.org/Upload/files/20210910170347.pdf
    • http://bangtaisay.com/uploads/userfiles/file/19431431065.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=medium+used+in+art
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb52.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB52 16792 bytes
font_01_sfnt_off00011364.bin
59c75d902c774fbbff26051997e7b4957261edecd9f8914568514d956035f637		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11364 18504 bytes
font_02_sfnt_off0001438e.bin
d989765e143c97caa59957e174bf0381a079e7845880727d6ace057462272fab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1438E 10336 bytes

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