Malicious PDF — malware analysis report

Static analysis result for SHA-256 320567c4a42d842e…

MALICIOUS

PDF

69.3 KB Created: 2021-09-25 06:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: d244d5559b70c3b3ef42f42918d08fa6 SHA-1: af2cc58d5ff4d718b588271994b2e57150d74479 SHA-256: 320567c4a42d842e00d8c84226d40a4b517b6a28aff080262fbf7ded30f8b666
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. It also features a link farm pointing to multiple external URLs, many hosted on compromised CMS platforms, suggesting an attempt to obscure the final destination or distribute payloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://infrive.ru/uplcv?utm_term=worldbox+earth+map+download+android PDF link annotation
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161326582c0d2b---3658411058.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143cf120c944---98482865012.pdfIn PDF document text
    • http://boonfagrandhome.com/user_img/files/xejubemipogevobo.pdfIn PDF document text
    • https://adikmanis.com/contents/files/jerenozuxatenigejexifab.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/ninigola.pdfIn PDF document text
    • http://baharev76.ru/userfiles/file/11797984520.pdfIn PDF document text
    • https://austarpharma.com/upload/files/gegigugifufi.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/fobedapiwuvipesojenawor.pdfIn PDF document text
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/kupixudilo.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1614cd734e1160---99777520752.pdfIn PDF document text
    • https://laptopserwis.com/app/webroot/media/files/14153102748.pdfIn PDF document text
    • https://apaman.ti-am.jp/js/ckfinder/userfiles/files/61188749419.pdfIn PDF document text
    • http://massimobertoarchitetto.com/userfiles/files/jenajesewifa.pdfIn PDF document text
    • http://fuguchair.com/upfolder/e/files/20210912210925.pdfIn PDF document text
    • http://dsagco.com/Upload/file/noberokalanililapoxe.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/xafowasujadivimurer.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1614195d9e7ace---94024118056.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613d8a9ce289b---37174540645.pdfIn PDF document text
    • http://c-amc.com/upload/files/xuxojaxu.pdfIn PDF document text
    • http://letnipohar.cz/upload/file/52805635767.pdfIn PDF document text
    • http://www.otevrenysklep.cz/ckfinder/userfiles/files/64409484123.pdfIn PDF document text
    • https://kristinanamaste.eu/files/toliminerakujavatavax.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_off0000ae6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE6C 10812 bytes
SHA-256: 6fd2383ce6180e76ecd14c1c77f3f46c93853340ae3c1f2ab76ae56f7f67fc41
font_01_sfnt_off0000c6e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E8 15416 bytes
SHA-256: 9c747bd49543f17b736271a6fcc274535f712bfcff1e5faed6d82a29d3ce6fd5
font_02_sfnt_off0000eddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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