Malicious PDF — malware analysis report

Static analysis result for SHA-256 674044bf4f01bcbc…

MALICIOUS

PDF

73.2 KB Created: 2021-09-16 06:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ba3324616259786e2b6dac671fc67c9d SHA-1: 5a9deb555a0a37ec5004a8a8a90beb2a077f527d SHA-256: 674044bf4f01bcbc90658280a90364097cdb39c67b3d01ce8822b834de7e8469
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to numerous disposable hosting sites, indicating an attempt to distribute malicious content or conduct phishing. The presence of multiple compromised CMS upload links further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/2905a467c53bdf43c6de60987456e30c/80852293478.pdf In PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/65537913790.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/3316939310.pdfIn PDF document text
    • http://korytnica.net/data/files/48802503040.pdfIn PDF document text
    • http://mvsexpo.ru/admin/ckfinder/userfiles/files/65808158615.pdfIn PDF document text
    • https://bdlvn.com/steel/upload/files/pabis.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612f79556e404---gigoxos.pdfIn PDF document text
    • http://trevelci.ru/ckfinder/userfiles/files/binatixu.pdfIn PDF document text
    • http://01host.ru/userfiles/files/86916942761.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/55969018027.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161419f80b4365---tomovogosupisigonujur.pdfIn PDF document text
    • https://simplehome.ro/ckfinder/userfiles/files/40960473374.pdfIn PDF document text
    • https://cemb.ca/upload/editor/file/43486485888.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1613d882fe8149---27203863810.pdfIn PDF document text
    • https://isosklo.cz/uploads/ferobojobet.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/3vmaghqevtkvc6kvqrv5m97vhs/54595697040.pdfIn PDF document text
    • https://felicitareonline.ro/ckfinder/userfiles/files/dositoligozitawifujifor.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/perizuvemakalovip.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/loluzukasa.pdfIn PDF document text
    • http://hyundai-dongdo.vn/images/files/94260219204.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/file/1631567079_1.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/paxigejatefupedopiko.pdfIn PDF document text
    • https://steammining.com/userfiles/file/dukavuwogesupipi.pdfIn PDF document text
    • http://wixoon.hu/upload/file/92720182594.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=watch+justice+league+unlimited+season+1+episode+1PDF 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_off0000bae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE6 16164 bytes
SHA-256: fdf336c901e4065f17faec9631e27870ef63b124c4ecdedd9098dcc0b1ba5db3
font_01_sfnt_off0000e4c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C6 11136 bytes
SHA-256: cfbb972aa84d1bde05492f649f42677d9aac065511af9b82ade77e48f7a3f8b5
font_02_sfnt_off0000fe69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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