Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e04018830e0ffe5…

MALICIOUS

PDF

80.6 KB Created: 2021-09-04 01:36:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a001ca32c57b90ebcdde8e441a033424 SHA-1: 50fa8fd00dcb8b28bd0a712552abaecfa248770f SHA-256: 6e04018830e0ffe59ae5972a8936ace467fc1ab7e9d36cc2be45ecf29d6febaf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection as 'Pdf.Phishing.Trojan'. It contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and link farms indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=business+recorder+newspaper+pdf PDF link annotation
    • http://smeclassof1987reunion.com/clients/37165/File/zipijadobidejaxemufidu.pdfIn PDF document text
    • http://i-physiology.ru/upload/32606857306.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f302e88abb5---72903306865.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/1191ce80cc3aab29f28bec5e0c752dcd/kawunobegu.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/lrsag6d9gb2vcvsaj7bdbugh15/dusagepesunojudunawofajeg.pdfIn PDF document text
    • http://bogaarchitetti.it/userfiles/files/93314636248.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/pq72omps1992v4njibp15s2265/36518055893.pdfIn PDF document text
    • http://tort-art.ru/userfiles/file/85982106007.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/9c19bc623bd3f6fdfe3c5cae0d71fb5b/26116661949.pdfIn PDF document text
    • http://alwaysshine.com/fileimage/file/2179460863.pdfIn PDF document text
    • https://thic.net/plugin/ce1/ckfinder/userfiles/files/71891375352.pdfIn PDF document text
    • http://kbchina.de/upload/31813646007.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/fajapek.pdfIn PDF document text
    • http://itcbeautytrainingschool.com/userfiles/file/59509964495.pdfIn PDF document text
    • http://ventima.ru/userfiles/file/fizap.pdfIn PDF document text
    • https://www.igescanada.com/ckfinder/userfiles/files/47644080097.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/fegazupenopub.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/43400480495.pdfIn PDF document text
    • https://avenue102.com/uploads/file/43934338714.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/7of0aujnfn9huvs9c5iam6qjm2/42125872748.pdfIn PDF document text
    • https://raljob.com/userfiles/file/57695268604.pdfIn PDF document text
    • http://npi-management.org/ressource/site-image/files/pinel.pdfIn PDF document text
    • http://klpa.net/userData/board/file/fonituw.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/52823237416.pdfIn PDF document text
    • http://generale-bureautique.fr/gdb/files/file/21733139500.pdfIn 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://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_off0000d8c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D6 16516 bytes
SHA-256: f5fdf25844610949705369d3c16e9ea5fed1bc31914b2eb6ac01e099a630a57a
font_02_sfnt_off00011bd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD6 10708 bytes
SHA-256: 54cab26ff9069e3443be59ffafe711bd3a1f82494dc9e6a4eeb06ee80cabc0d8

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