Malicious PDF — malware analysis report

Static analysis result for SHA-256 93760a9e1a07fcbc…

MALICIOUS

PDF

82.8 KB Created: 2021-09-20 22:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bd620a065d787690fc4f515d0348d08f SHA-1: aae642a6e7a167c5bb689fda6eef0e0903e68b16 SHA-256: 93760a9e1a07fcbc7eba42bda2cf2d013636ee72da3c989c9190d845e39e4c4c
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to compromised websites and potentially disposable hosting. The presence of numerous URLs, including one pointing to a WordPress upload directory, suggests an attempt to distribute further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://coretry.ru/uplcv?utm_term=deadpool+2+tamil+full+movie PDF link annotation
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/161377078e783c---metevanividegija.pdfIn PDF document text
    • http://tecniagua.es/uploads/ckfinder/files/55935575080.pdfIn PDF document text
    • http://d2dgroup.net/upload/files/buruvafixidojuzopiwek.pdfIn PDF document text
    • http://siciny.eu/userfiles/file/72753846133.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16142c12fd9b6c---22151173396.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/161381353e02b3---59947285515.pdfIn PDF document text
    • http://mobilenmr.com/files/files/62341496267.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/48185012413.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/tesofuwokitipepenigefiru.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/65133528184.pdfIn PDF document text
    • http://kaztelcom.kz/ckfinder/userfiles/files/satanekonusezomitivep.pdfIn PDF document text
    • http://dienvietbac.com/uploads/files/gusutuxurebugawow.pdfIn PDF document text
    • https://myvideoclasses.com/ci/userfiles/files/xesajuxezabetelusugivex.pdfIn PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/sekikoxedapixakagaxitul.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161475ee8147c6---rekipizojanixajalewo.pdfIn PDF document text
    • http://maidichike.com/upload/files/90535665195.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/54297688387.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/ligusopukefajuvuk.pdfIn PDF document text
    • https://thebookonpersonaltransformation.com/FCKeditor/file/26621775459.pdfIn PDF document text
    • http://gpshardorawal.com/hemkunt/userfiles/file/61453916370.pdfIn PDF document text
    • https://bu8m3tas68s-b1.com/contents/files/farolotarotenutipi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD592 10576 bytes
SHA-256: 0915a8f1e62ad82341e02792b61cc9067e5b58efa8f1a93fab704dd9ab2308ae
font_02_sfnt_off0000edc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC3 23580 bytes
SHA-256: 32c4a5a4d047564024d15087e1bd9b056971271b1657a61fb64396003aa8a474
font_03_sfnt_off000127ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127CA 16160 bytes
SHA-256: fa5cbea137587b1d4bb1c548ff3f8d17a18587fe273de630a8d80f12e69f99e4

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