Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c6275a5990747ae…

MALICIOUS

PDF

74.0 KB Created: 2021-09-19 09:14:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: baba5d7f3fc818208536aa6548e7d716 SHA-1: c4498a7940bf18365b833451af0e7d8826da1a8d SHA-256: 9c6275a5990747ae36e711f3c442bef681ff42fc1bfc6c8033db951ae864af32
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of embedded URLs, many pointing to disposable hosting and exhibiting link farm characteristics, suggesting a phishing or malware distribution scheme. The presence of external URIs and the overall structure strongly suggest the document is designed to lure users to external sites.

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://pixomot.ru/uplcv?utm_term=best+android+game+hack+app PDF link annotation
    • http://alcantara.cz/data/file/widuruminogufoxi.pdfIn PDF document text
    • http://folientastaturen.pl/_data/file/guzemi.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/45823177593.pdfIn PDF document text
    • http://ttc-investco.com/img/files/vogisubifesolanimakubiwo.pdfIn PDF document text
    • http://toptoptraining.ru/img/upload/file/96653394342.pdfIn PDF document text
    • https://jjpremiers.com/files/1050390582.pdfIn PDF document text
    • https://sibservis.com/ckfinder/userfiles/files/48337147726.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/labokugusujanejid.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/kanikomisanivarasegi.pdfIn PDF document text
    • https://easternresources.net/ckfinder/userfiles/files/47908022560.pdfIn PDF document text
    • http://oris-am.com/editor_up/61862067053.pdfIn PDF document text
    • http://hbisan.com/userfiles/file/ninewunigubipariw.pdfIn PDF document text
    • http://sumosushingrill.com/uploads/files/20531967799.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/80127277461.pdfIn PDF document text
    • https://etadelloro.it/images/file/povunejomaripif.pdfIn PDF document text
    • https://dottoridegregorio.it/public/file/24455744905.pdfIn PDF document text
    • http://berbun.com/user_img/file/rurexetukiramezodekufaf.pdfIn PDF document text
    • http://hotelclinton.it/userfiles/files/36477617902.pdfIn PDF document text
    • https://cristalensi.com/public/File/dogulifatefo.pdfIn PDF document text
    • http://www.smartusb.info/images/library/File/68653480609.pdfIn PDF document text
    • http://fioredda.com/userfiles/files/sipesudolabezadizo.pdfIn PDF document text
    • https://biroestarsa.hu/uploads/file/38499199314.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/23cec57def1ecbece49bb204185306b1/27019981353.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_off0000bc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC6D 17256 bytes
SHA-256: 62a2e33a2e656ca9396e3d99951cb7231041896063a72b86b30e57a2ee022e1c
font_01_sfnt_off0000e922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE922 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10139 11060 bytes
SHA-256: cf0b20569b708152e3937dad3c36df2b614768d00e9a1155d00503d89e4acd9c

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