Malicious PDF — malware analysis report

Static analysis result for SHA-256 cebf80f5b59c1e96…

MALICIOUS

PDF

83.9 KB Created: 2021-09-11 16:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 055b2321d6d34b5027467e58e323d374 SHA-1: 3e5eab71fc6061cb9a81810c730c961911276d77 SHA-256: cebf80f5b59c1e961c8c8aa19fde01857b32c19ded921f2cd75001d8950b9059
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external links, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting a phishing or redirection scheme. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards an attempt to direct users to potentially harmful external sites.

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://unitec-egypt.net/userfiles/file/vuvopagiku.pdf In PDF document text
    • https://nergizleryapi.com/image/files/25105171551.pdfIn PDF document text
    • http://hongsung114.com/files/fckeditor/file/76772719798.pdfIn PDF document text
    • https://ekoelprom.pl/public/images/editor/file/38445054852.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/19904140116.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/debotodexozogovaruvelizir.pdfIn PDF document text
    • http://biznesfishki.ru/files/userfiles/files/36880397435.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b2533b314a---4864462170.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/2d2e4d228b1b8937ce43d26ad1ee60e2/8175040563.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210903_324F5C866050FFD8.pdfIn PDF document text
    • https://caror.hu/ckfinder/userfiles/files/manok.pdfIn PDF document text
    • http://sevvalturizm.com/rsm/files/xivasokiwe.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/78249562556.pdfIn PDF document text
    • https://torgradio.ru/new/files/file/gizul.pdfIn PDF document text
    • https://siliconautomation.com/userfiles/file/41138528891.pdfIn PDF document text
    • http://misterholidaysanprisco.it/userfiles/files/61778186472.pdfIn PDF document text
    • http://pytextiles.com/userfiles/file/tiluxepotowefugubunibu.pdfIn PDF document text
    • https://motodubai.com/uploaded_images/files/82359086129.pdfIn PDF document text
    • http://rent-lease-no1.com/userfiles/file/20210907185542.pdfIn PDF document text
    • http://standartbio.com/fckfiles/file/73068289678.pdfIn PDF document text
    • https://fontan-montag.ru/img/upload/86207919083.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/wozidarizaxiwezozavu.pdfIn PDF document text
    • http://daegyung.kr/userfiles/file/20210903050517.pdfIn PDF document text
    • http://wawa757.com/uploads/files/97838287547.pdfIn PDF document text
    • http://ominocoibaffi.it/userfiles/files/10732934940.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=watch+fifty+shades+of+grey+freed+onlinePDF 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_off0000e2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A6 10864 bytes
SHA-256: 5ab87f11cc53f24adeab3bb599317e0dd0101b328f3c46895e2a49e14f38c884
font_01_sfnt_off0000fb8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8D 17692 bytes
SHA-256: c4568d821553f43bf4c4f9122d34700e443edca1a88586fcf7ec70a4a856d0f8
font_02_sfnt_off0001296a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1296A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1