Malicious PDF — malware analysis report

Static analysis result for SHA-256 06abc3c6745ef024…

MALICIOUS

PDF

78.9 KB Created: 2021-09-17 18:23:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9664737673b8a87b312c90a122a873c6 SHA-1: 18b23ebf0c353e0dd42bd8d5421adcd47608e80c SHA-256: 06abc3c6745ef024bb2879f1ced8eef46f975128e6e9807b661a4ad9379060df
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external sites, many of which appear to be on compromised or disposable hosting, suggesting a link farm or redirection mechanism. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to prompt the user to make a phone call, a common tactic in tech-support scams and callback phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://nomylo.ru/uplcv?utm_term=mortality+by+christopher+hitchens+pdf PDF link annotation
    • http://veitali.com/upload/files/nawazut.pdfIn PDF document text
    • https://excore.hu/ckfinder/userfiles/files/vinijewasodoxedelofisabi.pdfIn PDF document text
    • http://noithatachau.vn/webroot/img/files/daxena.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/81237000194.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/161318038efb45---26569187466.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1613f96bebeedd---78056530086.pdfIn PDF document text
    • http://warmistore.com/userfiles/file/veruxudakixubekamu.pdfIn PDF document text
    • http://gryfarmerskie.pl/pliki_wyswig/files/pupodij.pdfIn PDF document text
    • http://sambometal.com/dataroom/file/bunifugibeg.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/52141570657.pdfIn PDF document text
    • http://olympiad-bigben.ru/ckfinder/userfiles/files/mekimakevomemagopalu.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137c6841d52a---tijusipix.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lulisijonepodiguribev.pdfIn PDF document text
    • https://pharmawell.eu/ckfinder/userfiles/files/kafezaz.pdfIn PDF document text
    • http://antoniolescio.net/userfiles/files/vozuwasitopu.pdfIn PDF document text
    • http://zbirozskepodzamci.cz/userfiles/nifikaxujimif.pdfIn PDF document text
    • http://w.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/natesibeviriru.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16134e756b2cc8---74167000111.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138819308d1b---12036188983.pdfIn PDF document text
    • https://psg66.ru/admin/ckfinder/userfiles/files/92692794163.pdfIn PDF document text
    • http://archiw.bibliotekalesmierz.eu/img/upload/files/tepodadexizaje.pdfIn PDF document text
    • https://everestart.com/images/stories/file/10044221773.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/94557599845.pdfIn PDF document text
    • https://ver9.sonikgps.com/ckfinder/userfiles/files/92476709313.pdfIn PDF document text
    • http://sbcnepal.com/images/file/86362760204.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/vuzafizo.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_off0000cc4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4D 10964 bytes
SHA-256: 0e64114e65e11dac50d7c3f1a6b90f0ca813a449a46aef698b4884d347c9cc0f
font_01_sfnt_off0000e585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE585 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD97 18324 bytes
SHA-256: e00a6b856f3cfccf2bba4408fda10ab4a97695acb3d0e03fa34204deacef6583

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