Malicious PDF — malware analysis report

Static analysis result for SHA-256 e77f080e65b19ef0…

MALICIOUS

PDF

77.3 KB Created: 2021-09-16 23:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 065b24b67cf8a9b111a6c14db6f7609a SHA-1: 954d367c5da76e287c50f03d72f794b4a8a4bf0f SHA-256: e77f080e65b19ef0920959652aa9d5923badb48009eed71eba14b4d0a899cb31
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to potentially malicious domains, and is flagged by ClamAV as Pdf.Phishing.Trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting an attempt to obscure the true malicious destination. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest it's used as a lure for phishing or to redirect to malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://nieruchomosciklodzko.pl/files/file/pegifamowadip.pdf
    • http://autosoftware.company/autoresponders_images/files/titupopibipafirazubikese.pdf
    • http://psychanalyste-gard.fr/ckfinder/userfiles/files/maluk.pdf
    • http://sanyosushiglendora.com/uploads/files/94179709242.pdf
    • http://adirondackseafood.com/ckfinder/userfiles/files/6110282336.pdf
    • https://malabarmail.com/ckfinder/userfiles/files/60302113373.pdf
    • http://musiclivemarsala.com/userfiles/files/xodidulutuxivoguzebuza.pdf
    • http://biosafety.biz/ckfinder/userfiles/files/45008987650.pdf
    • http://msslink.ru/userfiles/files/26265331194.pdf
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/57046214022.pdf
    • https://alkirbilaw.com/userfiles/files/xejitexar.pdf
    • http://zezoalza.com/ckupload/files/pezafabafomitifesajonebo.pdf
    • http://alpha-cp.com/userfiles/file/dudorigotazagubopake.pdf
    • https://delaneyllc.com/ckfinder/userfiles/files/22092614393.pdf
    • http://nail-free.com/ckfinder/userfiles/files/24114656404.pdf
    • https://ventadeterrenosurbanos.com/userfiles/file/95275064339.pdf
    • https://siliconautomation.com/userfiles/file/debatunesapuxuz.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/eca163e1dcbeb34948aeac9095360d65/tesikixel.pdf
    • https://airbays.com/userfiles/file/tenovow.pdf
    • http://amphorabeautyclub.com/campannas/file/gusotuvegonedenomin.pdf
    • http://zlhk.ru/upload_picture/file/jetek.pdf
    • http://vinmexindia.com/uploads/4932617001.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=android+studio+background+service
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce0e.bin
341dffa55c21c7b7466179a2e004aa53b4fc842bee3b0b0c7bb995c0aaa3ce64		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0E 15764 bytes
font_01_sfnt_off0000f685.bin
7b9948ca42ced85a3065176da81d736d094b7c986ab468ac9b1bfeb9d65630ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF685 10880 bytes
font_02_sfnt_off00010fb0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB0 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.