Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a2d200f4c0bd617…

MALICIOUS

PDF

82.6 KB Created: 2021-09-12 05:27:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a88ddf24fb7b48648a3540888c5c649e SHA-1: 36bab98ff134c3adcc73a6aad15b659e6b326cc1 SHA-256: 3a2d200f4c0bd61778ade1e61af3141eb210cda3feaaa5637655a94fdd99ade0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with many pointing to unknown domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document as a link farm on disposable hosting, reinforcing the phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://manenshop.com/upload/files/16657276198.pdf In PDF document text
    • https://cfi-registration.org/buzzboxgift/img/userfiles/files/35169530250.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021090423102173499.pdfIn PDF document text
    • https://billionbosses.com/ckfinder/userfiles/files/49486995014.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/tojarukagi.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161355a0e86da4---41867940667.pdfIn PDF document text
    • https://www.delaneyllc.com/ckfinder/userfiles/files/77497547357.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/86511382836.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/12097080066.pdfIn PDF document text
    • http://shlawllc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kowifab.pdfIn PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/kaxekozokesefolitedona.pdfIn PDF document text
    • https://baongochoa.com/upload/file/tabelewumuwitud.pdfIn PDF document text
    • http://larben.cz/media/images/upload/file/bujuzevatemewerif.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/kubixolibajedekeriwitobog.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/88955014515.pdfIn PDF document text
    • https://jurad.eu/files/file/xodomenana.pdfIn PDF document text
    • http://okna-stv.ru/userfiles/files/buvofidolelafuza.pdfIn PDF document text
    • http://hanlacsclub.com/ckupload/files/45820085491.pdfIn PDF document text
    • http://haphadoor.com/upload/files/95565716629.pdfIn PDF document text
    • http://rpsbchamber.org/editorData/file/48159713431.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132a5facaa84---fulusisebududovetapovi.pdfIn PDF document text
    • http://leadingedgecorporate.com/user_images/file/77537434774.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=angry+birds+epic+rpg+apkPDF 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_off0000dea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA2 10752 bytes
SHA-256: f348982fd1bec4ce6d6e4de870d9ca58b6e41962e1c0165105f8df8e658caaf3
font_01_sfnt_off0000f716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF716 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F28 17612 bytes
SHA-256: 8bfb131af1991e87b277fcb7c7c0667e40845521a7b8595179f3cd87b2488013

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