Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1a054dd87c01751…

MALICIOUS

PDF

83.3 KB Created: 2021-09-20 06:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1e4b2534b7615fbb0d657d6680755048 SHA-1: 371bd60ce8d77e420f9b3092153f7a7362448d96 SHA-256: f1a054dd87c0175137691497a49e7852cf59628be15f8142d61ac0b8e4e3c50d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which appear to be part of a link farm hosted on compromised or disposable domains. The presence of a QR code lure further suggests an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=how+to+find+out+saved+wifi+password+android PDF link annotation
    • http://devison-matras.ru/upload/file/zepupala.pdfIn PDF document text
    • http://ubestsports.com/imager/files/20210915204627.pdfIn PDF document text
    • https://konzolstudio.ro/uploaded_files/file/dafuxemifote.pdfIn PDF document text
    • https://horgaszvelem.elelmiszer-hazhozszallitas.hu/ckfinder/userfiles/files/67562138662.pdfIn PDF document text
    • https://sarna-zapiekanki.pl/ckfinder/userfiles/files/5028896804.pdfIn PDF document text
    • http://xn--80adib9cjd8a5e.xn--p1ai/i/upload/files/jularagas.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/161352eedebe49---wemebubugusune.pdfIn PDF document text
    • http://poketomecam.com/uploads/files/50544661049.pdfIn PDF document text
    • http://ecogestval.es/userfiles/file/roselipiwapon.pdfIn PDF document text
    • https://www.akilciilacdernegi.com/ckfinder/userfiles/files/22055001899.pdfIn PDF document text
    • https://sieuthimaytinhcu.vn/upload/files/sulotatugibejep.pdfIn PDF document text
    • http://dom-2000.ru/ckfinder/userfiles/files/40086437073.pdfIn PDF document text
    • https://alohasafaris.com/files/rumowatubuvuwo.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/5d10ca15496f46d13ce3cad30878e385/sivipovilavazare.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16130445269502---zaledoka.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea2d13b9d3---bijagezitobapukolefure.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16140c3d9db263---vebifasonosegotekipogu.pdfIn PDF document text
    • http://sino-web.net/filespath/files/20210906043853.pdfIn PDF document text
    • http://xn--d1achljw0b.xn--p1ai/content/upload/71728144205.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac8889ad00---pafesifarujogep.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613936de99db6---xanojibavakisoxeforokixa.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/76711457316.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/neliwokatipajunoj.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5bf7bfbb2---xemixiritevigim.pdfIn PDF document text
    • http://cbcom.fr/ressource/site-image/files/85826334185.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_off0000e068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE068 10688 bytes
SHA-256: 7e064d4f2c498fb123e040cf42c5ce6e2fde26b633be6314eb976bf20189b3e2
font_01_sfnt_off0000f90e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90E 17672 bytes
SHA-256: 5e0c811d336f5577f3e3c9330c2baaafb03040bedf616295047dfd3667137a2e
font_02_sfnt_off000126e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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