Malicious PDF — malware analysis report

Static analysis result for SHA-256 01b961a9a98db62b…

MALICIOUS

PDF

80.7 KB Created: 2021-09-18 00:27:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1c7bd990c8e2d9206b22eaf665824313 SHA-1: 8667ce002942afe479ea4ea008afe8b10ebd7f24 SHA-256: 01b961a9a98db62bd251f4be951132070cd4622833f1f3159ad1ba65406f3085
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://ericshartman.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/48855508917.pdf In PDF document text
    • http://lionsmarsala.it/userfiles/files/6243850145.pdfIn PDF document text
    • http://caythuocdangian.net/images/files/53349838130.pdfIn PDF document text
    • https://pmcp-avac.com/files/upload-ckfinder/files/minitoroxemotubujerabaj.pdfIn PDF document text
    • http://merwepizza.com/upload/file/30366618210.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/12779218572.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/68403514677.pdfIn PDF document text
    • http://pop-around.com/file_media/file_image/file/jasokubusek.pdfIn PDF document text
    • http://paddockj.com/user_data/editor/ckfinder/core/connector/php/upload/files/41176313545.pdfIn PDF document text
    • http://agierresrl.it/userfiles/files/91595101024.pdfIn PDF document text
    • http://neuchina.org/userfiles/file/patevidevevev.pdfIn PDF document text
    • http://galantemontagnana.it/ckfinder/userfiles/files/lixud.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/zijorusagopizob.pdfIn PDF document text
    • https://netiko.fr/img/Data/file/21629570355.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c01c2f23e2---50540765458.pdfIn PDF document text
    • https://deepex.hu/hirek/files/7245295431.pdfIn PDF document text
    • https://trsoftyazilim.com/genelresimler/file/51923547167.pdfIn PDF document text
    • http://gaishachuukobuhin.com/js/upload/files/pogasisukobu.pdfIn PDF document text
    • http://musicincw.com/fckeditor/userfiles/image/vogojozakalilinelivub.pdfIn PDF document text
    • https://medtek.vn/storage/file/lukojaxaxos.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/5e93c932f57389a1ea44a44dc4f0b9a6/xadipegulas.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137b76ef391e---jamerutezu.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kiwop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=sha+fingerprint+android+studioPDF 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_off0000d6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBB 17716 bytes
SHA-256: b6916aa9f8fa481a1df64f46635e1a72c99413b16fed731d4da104a7b72f9387
font_02_sfnt_off00011c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C60 10904 bytes
SHA-256: 9158f6e5bb79bf49a056db1532ebce5429498d3ecb9dd145892503292a196855