Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee669d1d5241f6bc…

MALICIOUS

PDF

79.4 KB Created: 2021-09-01 19:31:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d10c3d693fd30c4183ad8d85b5c3ee5c SHA-1: 6cd90a35b2dfc5a89033d8cf777ff0656e129184 SHA-256: ee669d1d5241f6bc984bc2e83cf9d17c2081dd71c496ba4b74980a06112bd53a
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and the nature of the URLs indicate a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://azseal.net/uploads/userfiles/file/16511898720.pdf In PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/25210939525.pdfIn PDF document text
    • https://amblamy.ee/upload/file/29199697967.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd359da68ed---93283852116.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/41078831220.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/df5a540b3bf37a0ddb6ada0681664344/vuralawikenufimijifanonit.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/sanet.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/90595657615.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/b46652ebfc9ddd6ab9918a640233c07f/44767807048.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/aeea785fa859e37498b6b7123d5fd363/jaxud.pdfIn PDF document text
    • https://hanurichurch.org/ckfinder/userfiles/files/33742314594.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/zitifapulufutatekuw.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/9d4f8ec7d5627d61c1a4e6484629aade/sajabojiv.pdfIn PDF document text
    • https://equipelec.fr/ckfinder/userfiles/files/kewikusevem.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078872786def---76638835690.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/ecbaf278010a348ca1165ff2180bb3d8/nafemopujejirubotopur.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/lutemibanesodadebenirex.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/d60bb77c225de3f1021f165acf01e7c0/51710636208.pdfIn PDF document text
    • https://e-fasteners.eu/media/file/15206216774.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/e9618e1022da7539d0dd06a1505fcff3/vigotise.pdfIn PDF document text
    • http://quiltingacademy.net/fckeditor/userfiles/file/daravegotixisopabake.pdfIn PDF document text
    • https://rinducm1.com/contents//files/situnodirigu.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/paxasotimis.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/st77rf4hh1fv8hbj3dlvc536l0/40237288486.pdfIn PDF document text
    • http://cokhitienvuong.com/uploads/files/34484007599.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=naughty+love+messagesPDF 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_off0000d4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFB 16760 bytes
SHA-256: 015a1565904940eb1e8a868771e4bffbfdbb74fb0911c46e2fda96cd81c8acc8
font_02_sfnt_off0001180a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1180A 10516 bytes
SHA-256: 030530762b88d37c45f63aba0ff09601f5085da955d081156108dc8d74143547

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