Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b46b5c124d238d2…

MALICIOUS

PDF

85.0 KB Created: 2021-09-16 18:37:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8a6226b91b30659acbacee82a3548526 SHA-1: 24d0325d196667c839849bf66478ca8e38364606 SHA-256: 7b46b5c124d238d258e7a91d685e01d7769b145128d12c42304f13784d96f73d
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded JavaScript and a high number of external links, many pointing to compromised WordPress sites, suggesting it is part of a phishing campaign. The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's content is designed to trick users into revealing sensitive recovery information. The embedded JavaScript likely facilitates the redirection to these malicious links or further exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://ketchas.ru/uplcv?utm_term=socket+osi+layer PDF link annotation
    • https://cosanuesa.com/componentes/editor/ckfinder/userfiles/files/93253976312.pdfIn PDF document text
    • https://firsatoyun.com/calisma2/files/uploads/87234375149.pdfIn PDF document text
    • https://caraudioshop.ro/mm/file/66037984744.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/f5808c0af5a6284e6d15aec7fcad2fee/kixaberopepuxuramomexex.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/5b2bddd37f787e7b27b1ce6590fa6980/vaduwubupid.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9c87c0560---welitibumapiwimufowisine.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613acad527717.pdfIn PDF document text
    • https://luckysurface.itweald.com/uploads/files/613cf9d1c1438.pdfIn PDF document text
    • http://mtt-association.fr/upload/file/piferixa.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/28878742633.pdfIn PDF document text
    • http://zzps.pl/userfiles/file/totidodiniwosufagorakogaw.pdfIn PDF document text
    • http://grotech.in/userfiles/file/29858331702.pdfIn PDF document text
    • http://serextion2006.com/js/upload/files/30921601612.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/bokofizabunizoloj.pdfIn PDF document text
    • http://rosg.net/sa_upload/userfiles/file/20210905125639.pdfIn PDF document text
    • http://belniig.by/public/file/muzodakov.pdfIn PDF document text
    • http://freewest.at/lupakozofakuwidina.pdfIn PDF document text
    • http://borisovhlebprom.by/var/upload/file/47584860945.pdfIn PDF document text
    • https://biocoils.com/img/file/18522154446.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613e4636ce45e---62733692673.pdfIn PDF document text
    • https://alwillislifecenter.org/ckfinder/userfiles/files/40438729431.pdfIn PDF document text
    • https://sonerofset.com/userfiles/file/nogiluxesik.pdfIn PDF document text
    • http://cu-mbc.com/ckfinder/userfiles/files/94643465701.pdfIn PDF document text
    • http://[2001:0db8:0:01:0db8:00:0:8:800:80:0:8:800:00:417In 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_off0000ea00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA00 17060 bytes
SHA-256: d33e25ba2edd61a7d2dd7c90311b07db7b4819321b35021952ec0a8052f67d27
font_01_sfnt_off00011685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11685 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E9C 10400 bytes
SHA-256: f85cc5e291ef286d9bdc0f72eef4076bfd9bfec3c0e5ba3022b6a0e9b614f759

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