Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ea9a2c886b802b…

MALICIOUS

PDF

83.2 KB Created: 2021-09-13 14:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1c6f2c8d39b70375216747324c07ab51 SHA-1: 0ffd8d57fbd410926d8f0636d1cf533dd61c4ffc SHA-256: b0ea9a2c886b802bd7591a1314f6091ec56c4dc822c461a55cfbaae1cb5eaca8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous links on disposable or compromised hosting further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://katyababash.com/images/uploads/file/torutipejijomemosev.pdf In PDF document text
    • https://ssvacancy.com/ckfinder/userfiles/files/8999750960.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613d726619ea3---walirige.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e7f99ac044---26249588857.pdfIn PDF document text
    • http://belloverde.net/emailer/file/tekidodumesikedulu.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16135e38f422a0---2453367118.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613595aed6250---vagujexumemu.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/jufikakorep.pdfIn PDF document text
    • http://wx-bm.cn/upload/ckimg/files/202109111449223482.pdfIn PDF document text
    • https://noithathoaphat11.com/upload/files/79750446187.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/kusudamukod.pdfIn PDF document text
    • https://justforjetscatering.com/userfiles/image/files/7747131716.pdfIn PDF document text
    • http://fruhmann-elektrotechnik.at/82128737518.pdfIn PDF document text
    • https://pasarantogel2.com/contents/files/xiligipejugetet.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1613a736b75ed1---52578240470.pdfIn PDF document text
    • http://zit-tech.com/userfiles/files/fonuv.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/xiberasidixef.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/86990fc8b9c9f3252c422463b2e64641/55410102933.pdfIn PDF document text
    • http://tsraccountants.nl/mailing/images/photo/file/56797431481.pdfIn PDF document text
    • http://iccjsc.com/images/uploads/files/zugategunumefaduvepobofum.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/66544879945.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/ladozo.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/617dae2f681355cb6c585caf7c4b5397/85170228847.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=gloud+games+apk+mod+downloadPDF 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_off0000df00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF00 10764 bytes
SHA-256: 155b809282a99aee701548aceffbfff8b0dca05cb3ab8ab92525ab65616cbf1e
font_01_sfnt_off0000f7a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A5 18128 bytes
SHA-256: be3a049987e13686d27fcd78655ff7bd49cd80ee758c0c961fc43001dfc2a5ee
font_02_sfnt_off000126b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1