Malicious PDF — malware analysis report

Static analysis result for SHA-256 f643df23c4f21654…

MALICIOUS

PDF

86.0 KB Created: 2021-06-27 10:55:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c10a35e5d2559014139b3f1b361f30df SHA-1: ef4aef569f130a525c4ac52b6fa7b9993ac1c31d SHA-256: f643df23c4f21654548a9dc8b3f8a3160f6d4444583498048d1e4723444c5f63
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://garglob.ru/uplcv?utm_term=size+80+in+baby+clothes PDF link annotation
    • https://aymfly.com/aym_image/files/14321632207.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c0a564fdc---94183446228.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd1f24a6c8---zexasusoje.pdfIn PDF document text
    • http://cadelupo.it/userfiles/files/45517993570.pdfIn PDF document text
    • http://nw-line.ru/generic/uploaded/kamisexojuj.pdfIn PDF document text
    • http://greenld.com/userfiles/28452535238.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb70784e91---54903938112.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/ramefofokuzufawalifo.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760c585b4da---55203217985.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/45508955202.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/85909638104.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/30006160366.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbcd3ade8b---26453792628.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/75658070724.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ad69dab3012---33545856326.pdfIn PDF document text
    • http://jar-ted.pl/file/36910028034.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/26815517057.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/44217253203.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a27e60eef4---tedabenole.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/7ff2ea686c28e9892e76d446904c9f6c/92982519803.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/likufupezav.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d8292020e4---kosakuvazafexijodov.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_off0000edb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C7 10948 bytes
SHA-256: 14007f1f6c0d1553e31447bec07da8c4441e19a44f98b20ea3c393a58425ebb4
font_02_sfnt_off00011f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F27 16732 bytes
SHA-256: 580e154b4e7b0e95bd6e9b29f2a381752b493609b533c676457156bbf89fa619

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