Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ea0b4f373d08d8…

MALICIOUS

PDF

70.1 KB Created: 2021-09-26 07:54:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f82507ca30caa02c9349599e4fdb5f78 SHA-1: f5741beaf2bceb5b3a45de3f2661e3e14f27d39e SHA-256: e6ea0b4f373d08d815e092389b43fe84ca61abb2d1cd3077f57daff64b97fa85
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs pointing to various domains, many of which are structured to appear as file downloads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm on disposable hosting, suggesting a phishing or malware distribution campaign. No scripts were extracted, but the structure strongly suggests a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://crewmak.ru/uplcv?utm_term=what+is+native+vlan PDF link annotation
    • https://georeno.ca/userfiles/files/pawozinawitunazeva.pdfIn PDF document text
    • http://comitatoamiantovelodromo.org/userfiles/file/90773528655.pdfIn PDF document text
    • https://devcons.org/uploads/userfiles/files/dowamuzekupogofegevi.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/76867070741.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/23088899673.pdfIn PDF document text
    • http://skolky.info/foto/images/file/28965759127.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/dosuvamero.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/ahud5vrampcop55cg9glsscht0/88673690178.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/34571570308.pdfIn PDF document text
    • https://sharedsynergy.com/userfiles/file/fipemoxowenobip.pdfIn PDF document text
    • https://vroa.pl/chplusfiles/file/57180537436.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/moloku.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b0c769658c---wegorebozepiraremed.pdfIn PDF document text
    • https://cemb.ca/upload/editor/file/wozokenumif.pdfIn PDF document text
    • https://tessuno.com/upload/files/6131cd6b5b68f.pdfIn PDF document text
    • http://scherzerpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/4800261604.pdfIn PDF document text
    • https://apc-algercentre.dz/ckfinder/userfiles/files/44239356294.pdfIn PDF document text
    • http://rotarytattoomachine.co/project-new/christianbook/upload_images/file/45302845022.pdfIn PDF document text
    • https://havadisname.com/upload/ckfinder/files/punem.pdfIn PDF document text
    • http://ccsl.asia/files/27366273872.pdfIn PDF document text
    • http://unleadedcoffee.cz/soubory/18468075502.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/20011543939.pdfIn PDF document text
    • http://020tzs.com/baige/images/userfiles/file/77955389580.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_off0000b1de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1DE 16992 bytes
SHA-256: c2c76903397c018b1937508867d550e04a2760b20ab93039cdb6279a59ceca96
font_01_sfnt_off0000dc7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7D 10044 bytes
SHA-256: f371e750b346ab9fec7c10015787efbb14492a27debbda066f867a835ed7c0b8
font_02_sfnt_off0000f2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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