Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0fbee0c936f5768…

MALICIOUS

PDF

70.9 KB Created: 2021-09-25 09:16:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 589eda2284145121a4138045c8ca92f3 SHA-1: 1fc0fed55a729b2b8359b4996dcc6a24e8baabf4 SHA-256: e0fbee0c936f5768726f615f196c700ad14644c65a4622a3bf73d5ae2926267d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to disposable hosting or link farms, indicating a likely phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to deliver malicious content or redirect users to phishing sites.

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://wastran.ru/uplcv?utm_term=best+drag+car+the+crew+2 PDF link annotation
    • https://thietkeweblongan.com/upload/files/kebesadodararerakusuxufus.pdfIn PDF document text
    • https://mayersoffice.com/userfiles/file/12858795004.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161314c2717cb3---783810361.pdfIn PDF document text
    • https://turkuazhost.com/calisma2/files/uploads/89510444501.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/74552109937.pdfIn PDF document text
    • http://pjcwyy.com/upload/file/vepafomijebabapejofukunof.pdfIn PDF document text
    • http://ayrh.internet-match.com/upload/files/81817617400.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///49400093816.pdfIn PDF document text
    • https://study-abroad-travel.com/ckfinder/userfiles/file/pidoxisomifule.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/40351418136.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/37953884468.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/48806316960.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16134a59ad7d05---negukotolapemigamuw.pdfIn PDF document text
    • http://drumlockingclamp.com/FCK_Editor_Images/files/senojoseno.pdfIn PDF document text
    • http://atletika-pardubice.cz/files/file/robisajabenipumov.pdfIn PDF document text
    • https://maisonfamillesrimouski.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/jurikagupowogivoxov.pdfIn PDF document text
    • http://novichiha.ru/pic/file/zajezowiwijobuboranifi.pdfIn PDF document text
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/35520629667.pdfIn PDF document text
    • https://pensiuneaselina.ro/userfiles/file/xirosukubumaxobeza.pdfIn PDF document text
    • http://veronikavilla.hu/userfiles/file/10921182902.pdfIn PDF document text
    • http://ozhelalikram.de/resimler/files/55412144930.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_off0000b039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB039 10548 bytes
SHA-256: 5fa317d9d4a1d99cdca0e562025fcd7f61c8f39fed6465e75ab266363d627e15
font_01_sfnt_off0000c858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC858 17856 bytes
SHA-256: 45f9b359d9fd7825e9c3f00951be8d583504caf913c05c9a4e890ffe2caa5f15
font_02_sfnt_off0000f6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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