Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e973eda4b946195…

MALICIOUS

PDF

99.5 KB Created: 2021-07-15 21:36:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e02bb35f3ae2665f199a70472cf89d58 SHA-1: 9e6f1fa174746f2a71ef8b3e59286df411bbf24a SHA-256: 1e973eda4b946195080e975ff5f12c9f88464bc4c2b736c8a130d345dbe18115
164 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm designed to obscure the final destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution through these links. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' confirm the nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://www.jobsincrete.gr/images/_user_na/file/84097213692.pdf In PDF document text
    • http://daiichilogistics.com/uploads/news_file/23255848677.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4b9cee008---kokabuk.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608df5c12f4a0---sodumugojutisotalifuvukex.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608430da1bab3---25605633530.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/2798911ca6bac5e15c4d9065fef9041e/44801184091.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b109f4dee47---70826186968.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e74dbd49a---30927156553.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160846b09aecd3---dozelamuvis.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/8615258962.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/0c2f4af89dfa2ef6bcbca1967dc81c35/1541179876.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/dvtghu9rjti9pakenju9to2dc0/rojasosobavikubasujunu.pdfIn PDF document text
    • http://ski-experience-japan.com/images/blog//file/75428840671.pdfIn PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/19890371342.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/rakunekopasefutesunem.pdfIn PDF document text
    • http://cortabellanews.com/userimages/fovenetibofebaninu.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/7cf14c41e180dd48ae090e3434d9448d/16454457829.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c48c0f9b88b---zavopid.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/pupafugizixaxetakamun.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ee1f819ce---lolafuti.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/57qk9tirseh5ni8ehi79gdikc7/3355335747.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/768894d4a6e546ed5c747cd1c7a8fff9/papodajanitadakubisuruv.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/gozokumonelew.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/54b47c5c4b5a2c05d61423cf1f998fac/wifoninupinakijiwatev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=followers+and+likes+for+instagram+mod+apkPDF 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_off0001205c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1205C 17872 bytes
SHA-256: b1faf70bb5c5f47fb9f356e724dbe5f19e08f051105e7a4c2288c95b762949d4
font_01_sfnt_off00014f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F1A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16731 10996 bytes
SHA-256: ae4b3db9f4d208ad9abb97320c838c2ab3c4cd5fc28e58ad37a267950d0f1e1a

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