Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e30887e7da28d7…

MALICIOUS

PDF

67.8 KB Created: 2021-09-28 23:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a9912d91b82dacfe38da58025e8c4b2e SHA-1: 38b85eb7459579c1425a6d6e3b190dee5ca8f42c SHA-256: 06e30887e7da28d75cde4418576fc2bb2ae4b4a3b08f29955fe6d34d018f3727
126 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs pointing to a link farm, suggesting a phishing or malware distribution lure. The presence of external URIs and the link farm heuristic strongly suggest the document's purpose is to redirect users to potentially harmful content.

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 http://inbeeldt.nl/userfiles/file/77269248400.pdf In PDF document text
    • http://abwjefferson.com/uploads/files/tefulazuwe.pdfIn PDF document text
    • https://buyafranchise.org/files/files/fewalen.pdfIn PDF document text
    • https://hygradeinsulators.com/images/uploads/file/15934741796.pdfIn PDF document text
    • https://kit-veron.my/ckfinder/userfiles/files/38548951485.pdfIn PDF document text
    • http://rovitek.com/userfiles/file/98807436928.pdfIn PDF document text
    • https://mai-avto.ru/upload_files/file/wimuvopugunesarepo.pdfIn PDF document text
    • http://lev-steklo.ru/userfiles/file/jozabevarubijubu.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/262fc8bec225eb6fea9d5b1ba65e3fc3/62173073498.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/81914187293.pdfIn PDF document text
    • https://lifecareproduct.in/ckfinder/userfiles/files/60646544956.pdfIn PDF document text
    • http://modulobase.com/userfiles/file/98300164824.pdfIn PDF document text
    • http://nsk-nalogov.net/upload/files/76493579104.pdfIn PDF document text
    • http://infoegrafica.com/userfiles/files/1763324326.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/naxazinalokekidut.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/72fa5ebe4b7e94a29c2ccf620d386636/gorirodikenewon.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/telifitotogumelibogotira.pdfIn PDF document text
    • https://travellifeafrica.com/ci/userfiles/files/41584094260.pdfIn PDF document text
    • http://yung-shun.com/userfiles/file/42908917347.pdfIn PDF document text
    • http://hglobaltour.com/FileData/ckfinder/files/20210927_D3C3668C115D3FB7.pdfIn PDF document text
    • https://kingdom.vn/userfiles/file/60766293428.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=best+free+phone+gamesPDF 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_off0000aba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABA1 15000 bytes
SHA-256: 29a54876adbdc34230bf2be62294f3d9245c4091a8533b5e4c09a351a88c6de7
font_01_sfnt_off0000d1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BF 10720 bytes
SHA-256: 8c35565d7db191d05037de986c16064d1ca1155fa898f917d288dcc8ca6de803
font_02_sfnt_off0000ea3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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