Malicious PDF — malware analysis report

Static analysis result for SHA-256 1330eca1e670b403…

MALICIOUS

PDF

76.0 KB Created: 2021-09-02 12:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 12bb7429dcb473b9531500a57fc0b4b2 SHA-1: efb6b82eaa5ab2283ae55acce49d6f257523e0f5 SHA-256: 1330eca1e670b4038d320f82979caa85197deb751780f2a1303e08becb60b951
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to distribute malicious content or manipulate search engine results. The file's structure and the nature of the URLs indicate a likely attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/2c5lq8obqeqnak9un7arh1skr6/jilubezipek.pdf In PDF document text
    • http://reginahajo.hu/_user/file/65513627986.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/woval.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be23c3995b6---rofabemavuzitudezewul.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/99762153c002ce6a704ca4bd519189f0/22720247095.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/bf8d50ec2b5e4ecf6040504c4a78508f/konurirezanosapaxanemuge.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/fiwik.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/gugaweminewavux.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/7428530911.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/7aa4448ad1fb76f972480d462357a63a/53162018974.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e55061d8a---44233054170.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1611fbcae952b8---diromagubevefekilubunoxi.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160faf9ea78c9f---64877934118.pdfIn PDF document text
    • http://daechienglishpark.com/ckfinder/userfiles/files/mixututawudumabebe.pdfIn PDF document text
    • http://maynenkhipuma.vn/quangbasanpham/app/webroot/upload/image/files/ronasirovizagewopum.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b737a52ce4---441169222.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ada05e8dd---wadusa.pdfIn PDF document text
    • https://bangvetthuong.com/luutru/files/bofekatizidova.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607f12f904214---jomirefikisasomobul.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/78500062639.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a06ef923c72---temilazazatugag.pdfIn PDF document text
    • https://etimes.mn/uploads/files/vuzupirofigavelutelasuxi.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/jileraruxozujomalalomu.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/54472576065.pdfIn PDF document text
    • https://studiovizia.com/webroot/img/content/files/vurosewep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=combustion+reactions+worksheetPDF 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_off0000c40c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC40C 10900 bytes
SHA-256: 94e28ee304b6ec68877e75ef89a941352c728a04d893ee36bc684042e1c7cd19
font_01_sfnt_off0000dd37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF549 17436 bytes
SHA-256: 482e4482abcd6e2e0843c6144e12253242def14c6ec40d6e91f444bda9465c45

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