Malicious PDF — malware analysis report

Static analysis result for SHA-256 602c007c7a359925…

MALICIOUS

PDF

82.4 KB Created: 2021-09-12 00:27:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b3452df7d957450cc74bafcfb426930a SHA-1: 06f896e88bda0ad160a5de212b1f627f4dbbfeeb SHA-256: 602c007c7a35992576d4a097ba6f1fd63b4a27a10aa06a6180a08fd99def61a2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a link farm with numerous external URLs. The presence of embedded URLs and the PDF's structure suggest it is designed to lure users to potentially malicious sites. While no scripts were explicitly extracted, the PDF's nature and the heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://arabic.cz/ckfinder/userfiles/files/52799903342.pdf In PDF document text
    • https://needlugs.com/userfiles/files/popotud.pdfIn PDF document text
    • http://maroba-zirndorf.de/file/ronebusevutovove.pdfIn PDF document text
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/020658091161.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16134e7e23d289---xowawowibeg.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/guwuribigevipi.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/venumudepixotoxuxogemi.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/b66c9d176752d6fe01f2cb3be85aa666/xituditovijokolelamak.pdfIn PDF document text
    • http://daejonggyoyc.com/userfiles/file/20210906093855.pdfIn PDF document text
    • http://markjfox.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/91553022310.pdfIn PDF document text
    • http://euro-ex.net/images/blog/file/39771925358.pdfIn PDF document text
    • http://whuntex.info/userfiles/file/21845567920.pdfIn PDF document text
    • http://directartdeal.com/uploaded_files/userfiles/files/44539322909.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/32909334941.pdfIn PDF document text
    • http://tuanlongland.com/upload/files/68648182786.pdfIn PDF document text
    • http://honeycontacts.com/uploades/userfiles/file/bawegalijesekimumuwegep.pdfIn PDF document text
    • http://olgapolyakova.de/files/files/16333834439.pdfIn PDF document text
    • http://achilleferolla.it/userfiles/files/jafawalatuxonepevirase.pdfIn PDF document text
    • http://spbmedaks.ru/sites/default/files/uploads/paganejajibiralidop.pdfIn PDF document text
    • https://sowlindia.com/userfiles/file/50738527658.pdfIn PDF document text
    • http://thaimassageboy.com/ckfinder/userfiles/files/11050529285.pdfIn PDF document text
    • http://bilateralmatters.org/userfiles/file/bevataguximurufujaluku.pdfIn PDF document text
    • https://horgaszvelem.elelmiszer-hazhozszallitas.hu/ckfinder/userfiles/files/99722379361.pdfIn PDF document text
    • http://skncn.com/u/files/pulefixuni.pdfIn PDF document text
    • http://momsystem.ru/public/file/dugosebopimuwejawukosa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=hd+videoder+downloadPDF 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_off0000dec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC7 10116 bytes
SHA-256: f0e1891855becc70fbd52f70a2d7fe69c9c5bc65c0c0f4a90bfcf879df920c31
font_01_sfnt_off0000f567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF567 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D79 17964 bytes
SHA-256: b3db72948c41de178654e66e13b6395e7d7bd0d8299b194327ba4a9fae58ead3