Malicious PDF — malware analysis report

Static analysis result for SHA-256 22580a67da589885…

MALICIOUS

PDF

81.8 KB Created: 2021-09-15 05:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: def405e243f55babd27711f9dfdf3735 SHA-1: 9726a51b53f469b954c3c1bd3b714be7b1ea8a46 SHA-256: 22580a67da5898858a03a875cbafced055196a12da12f8d2748669e93a82bfc1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and numerous external URIs that form a link farm, likely intended to redirect users to malicious sites. The presence of embedded JavaScript suggests an attempt to execute code within the PDF viewer, potentially for further exploitation or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://huntic.ru/uplcv?utm_term=dnd+5e+books+free+pdf PDF link annotation
    • http://ggbris.com/slbdavbatala/userfiles/file/faxetugesibag.pdfIn PDF document text
    • http://heryeryesil.com/resimlerfiles/pudoketajivoz.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1613afb4ce6a0a---22044815864.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/161410e1d6898b---63043489731.pdfIn PDF document text
    • http://upsshop.ru/ckfinder/userfiles/files/bidetoxexal.pdfIn PDF document text
    • https://masukpt1.com/contents/files/vipumiki.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/16136e1e9c0dda---83855590639.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/43564277627.pdfIn PDF document text
    • http://rfychina.com/upfiles/files/16308892679246.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/92735393797.pdfIn PDF document text
    • http://geoscan.it/userfiles/files/xopifefuworiw.pdfIn PDF document text
    • http://kovospm.cz/fotky/file/pezoka.pdfIn PDF document text
    • https://csmgh.net/pevron/www/img/file/36485511163.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161411aabaf22d---7706993155.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae9038f4de---nofapuwopozipekasopa.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1613e4d617b2b0---makijomasenikizu.pdfIn PDF document text
    • http://anchor-m.com/js/upload/files/ruxunapidawe.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/161413793f0597---nuletifipifedifuvijes.pdfIn PDF document text
    • http://ecole-belair.com/ecole/file/89737427509.pdfIn PDF document text
    • http://jmyhship.com/uploadfile/files/difuwaxekada.pdfIn PDF document text
    • https://eko-briketes.lv/userfiles/files/fukajozitobaf.pdfIn PDF document text
    • http://kerama.altrodesign.eu/ckfinder/userfiles/files/79811132482.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/2jpbee3hqt146u1ft135aev1n7/gojajiza.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b48fc71a39---93450259981.pdfIn PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/jawatugijebogufajinen.pdfIn PDF document text
    • http://ykzn8.com/upfiles/editor/files/wanoled.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_off0000dca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA7 17620 bytes
SHA-256: e15d3e62cd7267c560d0324adf98503b14dbed7007033a74694cfd6eaa10e8d0
font_01_sfnt_off0001097b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097B 10460 bytes
SHA-256: a57f40f57263cd8fa6c157d777cd33b1a456aa34b5228216df6d7f4aa8d192b8
font_02_sfnt_off00012128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12128 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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