Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc1bb6d20596b8b4…

MALICIOUS

PDF

81.4 KB Created: 2021-09-19 15:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5298537641e7ec5b534ce3e7cec250ec SHA-1: d008259a323754c2a16628204af5880e271efec3 SHA-256: fc1bb6d20596b8b4f487c119aabe4fa38a2448ceb9fb4f6b5148e21d1906df36
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The document contains numerous embedded URLs pointing to various websites, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of these external links indicates an attempt to redirect the user to a potentially harmful destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://nomylo.ru/uplcv?utm_term=how+to+download+in+videoder PDF link annotation
    • http://taikenplan.jp/ckfinder/userfiles/files/lepusewazazetafobukur.pdfIn PDF document text
    • http://gdgom.com/upload/file/21090905182817868573h0uhvjxuvc.pdfIn PDF document text
    • https://refakatci.net/userfiles/file/femilarozadavoluvasonudu.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/jujakelason.pdfIn PDF document text
    • http://moderncarrent.com/user_img/files/90786408854.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/bde2e6f74e3fe3f555c6931385e54192/jafezeko.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613f51945a745---67506460883.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139d94a0ba62---32653466479.pdfIn PDF document text
    • http://www.farmaciabergua.com/userfiles/files/69269428479.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/161354d6c69c4a---64029730779.pdfIn PDF document text
    • http://basketaci.cz/UserFiles/File/kitipamizomo.pdfIn PDF document text
    • http://fsanaq.com/upload/file/210913051307398502tti7ckr6fi5p.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/59394110913.pdfIn PDF document text
    • http://recviem.ru/img/upload/46420145919.pdfIn PDF document text
    • http://stlukesfp.org/ckfinder/userfiles/files/13716038101.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/324722596c9627875727ba5f3bfdf432/vuvipo.pdfIn PDF document text
    • http://salespate.com/userfiles/file/67345444656.pdfIn PDF document text
    • https://hebatkeren88.com/contents/files/13042219144.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/18467048511.pdfIn PDF document text
    • http://runhouchem.com/upload/files/gumeb.pdfIn PDF document text
    • https://habrit.tw/ckfinder/userfiles/files/50511696324.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/49991016230.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/22924357105.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613baa08634a2---84942778275.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_off0000dc31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF443 17484 bytes
SHA-256: 6cd3182a10506e744c7d02a74ecc6b1996c70a59ef42c28cbec361ecfa686ab9
font_02_sfnt_off00012169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12169 10216 bytes
SHA-256: 4a4c94d0adb04b275573f2fe4ed73559b6c0f2404bb10efa6ade8788aa78a873

Open this report in the interactive analyzer, or submit your own file for analysis.