Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f65d1a0d2f1100…

MALICIOUS

PDF

97.4 KB Created: 2021-08-01 01:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d86d21be336dc0c284db09aedac718e0 SHA-1: 7ada478f5b7ef8ba232677ab702ff3e90b3e1eec SHA-256: 56f65d1a0d2f1100296f1d9de41e5a8775c1a8d49c80c0fcb7a61ed2be59894e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the structure and URL patterns are consistent with a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://gonguyenkhoi.vn/upload/files/vuwojufapulalomenawij.pdf In PDF document text
    • https://clinicscrm.com/img/files/43540208903.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/24267338447.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/kh2qu8ack05lv6pv09mma82n06/kamatipigora.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b6923ceca---89469404308.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/19982ac06a6017ea79c9451b2d7512e0/pujeredumotenazupaxi.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/54iacqapcf9t90luf0jopgmo4p/wiwita.pdfIn PDF document text
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/69606657002.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/28093440237.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/tr15ko73qgau2mt04snudicb68/15973416355.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/oaj35000j8r5kkuuol7o7qiji3/93918639246.pdfIn PDF document text
    • https://elpollopaulino.com/cenavarra_userfiles/files/43824791015.pdfIn PDF document text
    • http://delve-cr.com/uploads/lugadogalajibagojarosuki.pdfIn PDF document text
    • http://tuanlongland.com/upload/files/19042364531.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9efe29f3b---jumosixupezezitiwig.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/vumilo.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/94126c8347b8241fa083330b2e34248e/junure.pdfIn PDF document text
    • https://pcstaiwan.com/ckfinder/userfiles/files/vudinozumodirolulut.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/d8e593ac9400418c5c6d6445d57ed1ae/34237689654.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/596fd86169db0ebc4370d4f05ee024fc/45978778031.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1609bfce3d732d---vidowugojomuxevoxaf.pdfIn PDF document text
    • http://luxe-pools.fr/i/File/tetobaxakulak.pdfIn PDF document text
    • http://santeh.md/img/files/4731394440.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=vpn+super+unlimited+proxy+free+download+for+pcPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE45 11152 bytes
SHA-256: b9ef476634934f5bc9cf754f73b91f4c0915cc2bd02292092439cc7b9f1788d9
font_01_sfnt_off0001186e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1186E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13080 18016 bytes
SHA-256: ed13ffe5204f03fc6205c2f739b816601c0f20a7065510d2b698de8e64283640
font_03_sfnt_off00016021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16021 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd

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