Malicious PDF — malware analysis report

Static analysis result for SHA-256 97de1c9fc5cbe0e0…

MALICIOUS

PDF

83.3 KB Created: 2021-07-07 06:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e02ef7f4c574bb282e044c267a95d324 SHA-1: ff91f921258569274246821e34b12ae9de401269 SHA-256: 97de1c9fc5cbe0e0bf6aea27d8b6fbb17170d5b4a065d273e04f51110785c2bd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure point towards a phishing or malware distribution scheme, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/13254f0a0d2c2421a4ce5f488cf30b3c/sifupivagifonuj.pdf In PDF document text
    • http://iphysiology.ru/upload/62152659352.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/firipiwotebaxadebalox.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779d137510b---gafefemiwupate.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/kunuwakewos.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab9892a07b---bujovopozomabov.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/75770124779.pdfIn PDF document text
    • http://galgalesh.com/userfiles/file/wexanejatikiz.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/bpkmfh0bs45ghejfq5o814am45/71211129273.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/31824227458.pdfIn PDF document text
    • http://palcev.ru/userfiles/file/24313769448.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/lijmq4bf5nho7hnlau0i5bub25/68658668044.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/24140979574.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160862a1a78c1b---lozevututisutanofebimutal.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/fa9c901024a15e541417767e413938b0/62560289075.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/dcctdq57f7g3m5s6mclujr034e/74009641042.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/zapadimonulisajatokasukan.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/d0eujafqbu3cjosfe5dsqk08va/94756939162.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/lowekigumanotegutud.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/gikububuzomupo.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/ravevurupaporuru.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160bb392b71615---67160842077.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160ad89e25dfea---27569106083.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/mugagiwijifetazanowozo.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/keghdo8p7k0085dv06kj5aq7n8/fimabatevidonod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=french+for+dummies+pdf+download+freePDF 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_off0000e1d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EA 10948 bytes
SHA-256: c2465ec4223f9728aa641ab663c43ec248b01a7f67ba71b045195091d933a8c4
font_02_sfnt_off00011310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11310 17364 bytes
SHA-256: 85b02280c181a56f27518bd6488e0464ff45acdc51708fc17d1d59e935b4d510

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