Malicious PDF — malware analysis report

Static analysis result for SHA-256 de2e9a6d10e32be6…

MALICIOUS

PDF

104.6 KB Created: 2021-07-19 03:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: ade66f148a08ce3604f561ca348ee87a SHA-1: 99d9260d18ed89f99015961d1e75ba7d5a66525b SHA-256: de2e9a6d10e32be6475c2b3dd68935436fe759f770b0520bcfc37c34864a7d62
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users to malicious sites. The presence of embedded URIs and the overall structure suggest an attempt to lure victims through deceptive content, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cbwmd.com/uploads/Files/duvavuxutedipusagefusuvor.pdf In PDF document text
    • http://minipit.com/data/files/8658494006.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af922509bb3---jepikixoxixaf.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/e7413dcf8164fe93f2ffaf570429b529/84546828827.pdfIn PDF document text
    • http://ingmarcofaedi.com/userfiles/files/96812952170.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/vibejomatusawatupa.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfbb490bf3b---66243026916.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/fvk42cvgpn160lh8fcppurpcvv/peradupifetosalizep.pdfIn PDF document text
    • https://zzwgjx.com/d/files/rawekesosabusitubukit.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/164a7874dda0095ed36210c1bdae3e73/22203994335.pdfIn PDF document text
    • https://fanaf.comarticle_ressources/file/62564347213.pdfIn PDF document text
    • http://sns.hu/_user/file/wewegewi.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/jurid.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/0d55ce6eb7bd269f5c9924925df01944/55379931224.pdfIn PDF document text
    • http://meta-min.com/files/xaletobudafasewemunis.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/834689b2691a1e6922e791b53092d810/nafubifobaxejigezonit.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b05c6981ca6---42544428559.pdfIn PDF document text
    • http://www.biotanika.pl/upload/file/48983055731.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/venugifarex.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e54d6ba833---60456932526.pdfIn PDF document text
    • https://kede.org/userfiles/file/20035319947.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210603_072949.pdfIn PDF document text
    • http://synowka.pl/galeria/file/kawopujexenetelibo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160951276b4a63---mufitukosebolozuxikegepu.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/77ed6c370d720c710293b9d24a4bac91/33794288941.pdfIn PDF document text
    • http://rgjbreunion.com/clients/6/69/6950e03db8b1ea894755b369f0a03c31/File/xobevuwulederudo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=best+movies+2020+bollywoodPDF 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_off0001366e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1366E 18188 bytes
SHA-256: 930533f67ee43120acb2a0839fa769d0970a34d28692c9a9cc6bae558e20dd23
font_01_sfnt_off0001653e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1653E 10744 bytes
SHA-256: 19b869e429369374b509c3778b103c7d0ceae1a469cd9d9868b9e7ba481f34bc
font_02_sfnt_off00017e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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