Malicious PDF — malware analysis report

Static analysis result for SHA-256 1afd7b97e79c6328…

MALICIOUS

PDF

83.3 KB Created: 2021-06-16 20:11:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 71f1a97b73af7f753eb0e8cb7045fadd SHA-1: d0bbbee2fe39192fae27c15b8c67796960c12dbd SHA-256: 1afd7b97e79c6328ff0f867091c243b1e4d4dff0eed0aadcf049a2ea820cdc65
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML models and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to contain search query terms, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=no+man%2527s+sky+how+to+get+first+freighter PDF link annotation
    • https://theatresaucinema.fr/uploads/file/kasevazefugunuzifaf.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/16716759.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4db68307c3---57294851709.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/waropubir.pdfIn PDF document text
    • https://agermag.ro/mm/file/sevakemoki.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160941634047b9---5514984898.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606e7270106fb---69657245636.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/lmokemvtaal412fodhngl66akk/kexosikipixozak.pdfIn PDF document text
    • https://tonitomov.com/picture/file/mipimuxudebejojiwonuma.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e130e43bc---rujeraxarujo.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210609_87B994F083992FCF.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a77d3a0dd31---xalidotifurumasofa.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/11b4f3e1e94127d74104acd9db62bd0f/xowurifefute.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/5hvb3imnqo2ll2j5mobghtd3p9/rolajoped.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/potumo.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/2681184367.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/nerosimasidikudixino.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/4pls66u48vlcsa85vg25ed1dl5/jigazatoridupup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FC 5408 bytes
SHA-256: 854f46b9cdee9b9b4be8805e12943cac25112d1779a238e3c94629128ea8f649
font_01_sfnt_off00011966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11966 10760 bytes
SHA-256: f7185606066c396889228fb6872dd35266ebcb759a13c991e2dea92f92e53f86