Malicious PDF — malware analysis report

Static analysis result for SHA-256 9207bc2a8cef00f2…

MALICIOUS

PDF

72.0 KB Created: 2021-10-02 17:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 921398086e5199daa7e525d092575179 SHA-1: 3e80baa009cc9302dad17deee571047a5d10d770 SHA-256: 9207bc2a8cef00f2d5d2f1a770688dd400e77067749c43b15449e614c67c9360
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests it functions as a link farm, directing users to multiple potentially malicious domains. The embedded URLs, particularly the one hosted on inlandautorepairmurrietaca.com, are likely used to serve further malicious content or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/02fca0850ff25dc6a2b6d6957dbeec5a/gokifiliwakimabojo.pdf In PDF document text
    • http://sochi-riba.ru/ckfinder/userfiles/files/zadaxufuw.pdfIn PDF document text
    • https://paidionresearch.com/userfiles/files/tuganimisuba.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/fojapiselofabopiguf.pdfIn PDF document text
    • http://peter-crooks.com/userfiles/file/binuwosu.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/bexupumogilexubonewodoz.pdfIn PDF document text
    • https://homestayhoian.vn/uploads/image/files/19588187599.pdfIn PDF document text
    • https://femagnet.com/upload/edu/article/file/29305400066.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/11520542807.pdfIn PDF document text
    • http://cecev.com/stockages/files/sulowexonuwawepuwizanover.pdfIn PDF document text
    • http://haliburtonhighlandsheritage.ca/userfiles/file/fimomumitobotip.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153b1c279625---sawisozifusupilejezokati.pdfIn PDF document text
    • http://avandcie-automation.fr/ckfinder/userfiles/files/baruxesise.pdfIn PDF document text
    • http://it-hair.com/userfiles/goredarajinipu.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/fasamijurenu.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/vafogujumemapofulasugijo.pdfIn PDF document text
    • https://saksisan.com/upload/ckfinder/files/womeminifurasib.pdfIn PDF document text
    • http://balcimimarlik.com/resimler/files/zazubipojo.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/noganerasamus.pdfIn PDF document text
    • http://szjwwj.com/userfiles/file///49698043388.pdfIn PDF document text
    • https://skykharchono.mn/editor/files/58014375846.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/78299079010.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/sibiwo.pdfIn PDF document text
    • http://contrast.no/ckfinder/userfiles/files/mozizajojimed.pdfIn PDF document text
    • http://coolscape.info/images/files/80844647951.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+breed+equinox+dragon+dragonvalePDF 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_off0000b49e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB49E 10884 bytes
SHA-256: 66c592403042d752376609a4ff6e1d9c0394b4e78c516d763a3200931cf796cb
font_01_sfnt_off0000cd67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE579 17092 bytes
SHA-256: f4ea5685f3b41e9ddabfbc712b372590d13db47f1b302bef7afb8760da2c036e