Malicious PDF — malware analysis report

Static analysis result for SHA-256 26c6c2c26163909c…

MALICIOUS

PDF

74.5 KB Created: 2021-09-18 22:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: dc02e47c670ff40816fef11cabf09f72 SHA-1: f1da5605bf175d766da2fc49fd7ca2e05b64fbab SHA-256: 26c6c2c26163909cfe48d941d6a3e72c250d2768010729a76acd3ddca2c51337
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://tradegateindia.com/userfiles/file/vawexanolulilunekolife.pdf In PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16139eab226103---zaxini.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/161418e897ffef---60412275663.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/35741304769.pdfIn PDF document text
    • http://mayinluatudong.com/uploads/userfiles/file/rulol.pdfIn PDF document text
    • http://3asoft.vn/img/files/60687679059.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161303f439e5e1---kuwir.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee8abb762f---13507751223.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/fonosifuwitosuveze.pdfIn PDF document text
    • http://slovoveri.org/userfiles/77339877040.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f650c202fa---15033242157.pdfIn PDF document text
    • http://dainindo.com/Uploads/userfiles/files/27549260406.pdfIn PDF document text
    • http://devveb.net/userfiles/file/1784233667.pdfIn PDF document text
    • https://himarco.ir/basefile/himarcoir/files/worasabopumov.pdfIn PDF document text
    • http://m3hotels.com/userfiles/file/94966291693.pdfIn PDF document text
    • http://sake-tori.com/images/library/File/robixabavetulorisedote.pdfIn PDF document text
    • https://slide-bearing.com/d/files/78485961873.pdfIn PDF document text
    • http://hdg-gmuend.de/userfiles/files/52825520586.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/17452976517.pdfIn PDF document text
    • http://severstroysnab.ru/userfiles/file/sunukuxefe.pdfIn PDF document text
    • http://bangtutrang.com/upload/files/sofesewipeguj.pdfIn PDF document text
    • http://wacommerce.net/home/integrity/public_html/ckfinder/userfiles/files/25244547805.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/17942865182.pdfIn PDF document text
    • http://franceplus.fr/userfiles/file/87184325990.pdfIn PDF document text
    • http://umbabox.com/userfiles/file/34039569094.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/696a4e624157c3d81e1bed1c8419a570/godinirusomutidomunoligax.pdfIn PDF document text
    • http://ambulatorioveterinarioilghirlandaio.it/userfiles/files/25786360409.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=idle+miner+tycoon+mod+apk+free+shoppingPDF 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_off0000bea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEA9 16268 bytes
SHA-256: 049cf956cc37a7bb2a701c7b8866e04cfd301923bde3136b9c5ca8d3d72f7917
font_01_sfnt_off0000e7cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CB 11224 bytes
SHA-256: 5f37c1ad7ca19c22e67a62659075b8211d554f4de23adb3967e0f2507dd31fea
font_02_sfnt_off000101b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1