Malicious PDF — malware analysis report

Static analysis result for SHA-256 fefa5f99aae91415…

MALICIOUS

PDF

78.1 KB Created: 2021-10-09 08:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c29ea341163d9c6f2de8578277e67771 SHA-1: b04a5165ffebeefb354741dd81e7d4ccde5b5b4c SHA-256: fefa5f99aae9141580160a7dba46e1f2e84b75e2eb6cab9507fa23f490da03d5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains numerous external links, many pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics indicate that the document is designed to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://ketchas.ru/uplcv?utm_term=getting+it+right+business+requirement+analysis+tools+and+techniques+pdf PDF link annotation
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1615842aa16295---nonokitasazuzalarujo.pdfIn PDF document text
    • http://www.gieskestukadoors.nl/ckfinder/files/files/xasisux.pdfIn PDF document text
    • http://paolacaone.eu/userfiles/files/jusasanefekavedeb.pdfIn PDF document text
    • http://urjabatteries.in/userfiles/file/84455871431.pdfIn PDF document text
    • http://methese.com/upload/files/74214697771.pdfIn PDF document text
    • http://bbbo.handyfriendship.com/upload/files/16484972638.pdfIn PDF document text
    • http://le383.com/uploads/files/70764110489.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138291196adc---33658548347.pdfIn PDF document text
    • https://allegypttours.net/userfiles/files/jevilo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161416f123d31d---sajidusolibunididetogi.pdfIn PDF document text
    • http://basse-normandie.annuaire-regional.com/ckfinder/userfiles/files/jerox.pdfIn PDF document text
    • http://zsmnowakowski.pl/userfiles/file/64382262849.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/95003093900.pdfIn PDF document text
    • http://cmtl.in/uploads/userfiles/file/file/bulipazasejevimevupuz.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/74154378491.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/28930279182.pdfIn PDF document text
    • http://3mfa.com/images/editor/files/39220974161.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16132f81d65cb0---valuxebaturokuguxosolumo.pdfIn PDF document text
    • https://www.mnogotrop.com/ckfinder/userfiles/files/72051953589.pdfIn PDF document text
    • http://thainightjob.com/ckfinder/userfiles/files/fipasarixekeratab.pdfIn PDF document text
    • http://orsini-blasioli.it/userfiles/files/nefilimogarilawajatiguv.pdfIn PDF document text
    • http://xn--80aamwn.xn--p1ai/userfiles/file/bakosarajove.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/qolhe0ct66qpqeftcdvf02l0oo/luwowimariguv.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_off0000cba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e3bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BC 11604 bytes
SHA-256: 1ebfd2e7072d5bbf95a0f4e77dd1f05c0922f3f48ef7b870d4d428aff171d566
font_02_sfnt_off0000fe68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE68 16848 bytes
SHA-256: 122822301a6a2c8906bd1ef5cf19bc4bfcf7c3c8256981c2b6cc46783001f3cb

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