Malicious PDF — malware analysis report

Static analysis result for SHA-256 20ce66fefcb004d8…

MALICIOUS

PDF

75.8 KB Created: 2021-09-20 03:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8768f8a85024a7d8ac87701711b94340 SHA-1: b999b598a6c16149e709d023dfea5f92f28d64af SHA-256: 20ce66fefcb004d8c9602db44a0d9badd48059bdfd8b983e86a1b71ff428237a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous embedded URLs, many pointing to potentially malicious domains, and one heuristic specifically flags it as a link farm. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://condicionamentofisico.com/arquivos/file/vepak.pdf
    • https://dispecom.com/cms_dispecom/sgi_userfiles/userfiles/files/fapimusiwogus.pdf
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/52195305758.pdf
    • http://ruben.pl/ckfinder/userfiles/files/nojabokotiri.pdf
    • https://kimcert.org/E/file/56426244127.pdf
    • http://dulwichtaxi.com/survey/userfiles/files/96129594774.pdf
    • https://classykitchen.pl/web/uploads/files/xidotawemowofujuxemigize.pdf
    • http://suchanekstomatolog.pl/files/file/kudekanef.pdf
    • http://biswasi.com/userfiles/files/51924335840.pdf
    • http://euro-ex.net/images/blog/file/79230350405.pdf
    • http://srtprogetti.eu/userfiles/files/gigadumosatoperijejozati.pdf
    • http://racecross.com/upload/edito_fckeditor/file/99346616691.pdf
    • https://marblo.ph/app/webroot/img/files/lalamigejala.pdf
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/rogifarurabo.pdf
    • http://hondasushi.com/uploads/files/pisano.pdf
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/fovavakubunijuzob.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613f8ea0c058b---41400500425.pdf
    • http://szentimresiklos.hu/upload/file/rubosilofebagoz.pdf
    • http://phutungotodungha.com/img/files/96391112865.pdf
    • http://rainternacional.com/userfiles/file/zufijozedipekatuvigi.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142ee78702a7---fatedebowesizu.pdf
    • https://oolong-dining-co.com/webroot/editor-uploads/files/5323785052.pdf
    • https://highlander-inn.com/assets/userfiles/files/47574847542.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=war+dogs+putlocker
    • 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_off0000c333.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC333 16792 bytes
font_01_sfnt_off0000db4a.bin
d3dfe427602e08c40aab0de57c891bfe5abef83743654a56dd9776e85335e02a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4A 10680 bytes
font_02_sfnt_off0000f3c7.bin
68caf94c977fad10c4f789eb44a8c14249197c0a1c44a4780d80c4641d1acda5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C7 17780 bytes

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