Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd48942749a42b6e…

MALICIOUS

PDF

99.3 KB Created: 2021-06-10 19:03:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a25fb560e8945fe115f22c6bfe055481 SHA-1: 79bdda704dc8f837d5fa06958630f8a625271c89 SHA-256: fd48942749a42b6ebf55a8d8213bfcd0a81ce6aae9cf56a24074cced472a2e30
176 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are hosted on compromised CMS upload directories or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded URLs and the structure of the PDF suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://nomylo.ru/uplcv?utm_term=covalent+and+ionic+bonding+worksheet
    • https://akproauto.com/nbloom/fckuploads/file/barowunodanerivixejewuwo.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16082738af15ab---59422122715.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a87e66e5a3---putelaxuwodatamub.pdf
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/2fe8959e026e3e32081b1fcf11f93f58/4956542800.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbe084b76c---68727388706.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/e60c35b5b0553fd3b1f19bf067d2be42/10194616607.pdf
    • http://yorktownhs1987.com/clients/57482/File/5807067277.pdf
    • https://alakharia.com/public_html/userfiles/file/54928650758.pdf
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16080d76705ee3---15980095041.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b65d92b1866---81321255890.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f340179ec0---kofofetufimakawabuxi.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607c344ac5b88---dediwudakalewowikuk.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/622baf237b58f058d8197ebad9b6ee91/zezibilupepamaxojo.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/8ff72orl11r4kdmq9s6k51l0ha/7558978769.pdf
    • http://pamat.ro/UserFiles/file/56262026263.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013a98.bin
16bf27e22eac41a8227dd707b732b8caba26535d31f2807b170278724aef63b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A98 5368 bytes
font_01_sfnt_off00014ce7.bin
ab0fcf35b45a1719f8591a29d46f065779525f2a6140166e2d2f061656acdd58
pdf-font-stream PDF embedded font (sfnt) at offset 0x14CE7 10960 bytes
font_02_sfnt_off00017246.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x17246 4324 bytes