Malicious PDF — malware analysis report

Static analysis result for SHA-256 25fa341b95deba14…

MALICIOUS

PDF

80.9 KB Created: 2021-09-24 02:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4d87f31847562c4ef01e9200b13dc226 SHA-1: 6ecde6301379a54ac3717469db851b0a654c4b29 SHA-256: 25fa341b95deba14c17b39c5144df08882c478bae7f6b041bbde3f10d71ca91a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to link farms, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ojazzdance.fr/userfiles/file/68486372184.pdf In PDF document text
    • https://marlin-aquarium.ru/ckfinder/userfiles/files/4216765004.pdfIn PDF document text
    • https://alariel.be/userfiles/file/zanuzigeberumabozizu.pdfIn PDF document text
    • http://yieldpharm.com/upload/files/92684462956.pdfIn PDF document text
    • https://kapefashion.com/files/files/ruforetejap.pdfIn PDF document text
    • http://www.poliklinika-hb.cz/userfiles/file/dapakopalo.pdfIn PDF document text
    • https://marcvandewiele.com/userfiles/file/jopojorojonusiwixipiv.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/97182198592.pdfIn PDF document text
    • https://webornate.com/viking1/uploads/files/tuzatojexemevekawovid.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/33193920524.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614117d65cc19---nunizebuxafusobagufuro.pdfIn PDF document text
    • http://stringquartet.biz/web/images/fck/file/94897071355.pdfIn PDF document text
    • http://uslugi-ogrodnicze.pl/pliki/File/86390635555.pdfIn PDF document text
    • https://umiyawoodworks.com/fckdb/userfiles/file/gazevija.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/24470326515.pdfIn PDF document text
    • https://cahayaapi1.com/contents/files/mevomafimi.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/90871112311.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/diluzaraki.pdfIn PDF document text
    • https://nezrenpin.com/calisma2/files/uploads/fumilagatavofazilopesenu.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/pibibijuxedosemetudipom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=unblocked+games+onlinePDF link annotation
    • 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_off0000d8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E3 10756 bytes
SHA-256: d826a345c429678529e70426b74856fc7349def16102171c4ac13b4825e62c77
font_02_sfnt_off00010957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10957 17820 bytes
SHA-256: 3c03094c0c0d9e685887609aaf19dd95b2187ccacd22daba1f09c77da6ec0c8e

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