Malicious PDF — malware analysis report

Static analysis result for SHA-256 d354598d2d9552fb…

MALICIOUS

PDF

69.3 KB Created: 2021-09-27 09:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ed9c0803da7c2ee4623ef1b9d45a5e0c SHA-1: fe3b5b108b6bf1be701281bb23f59ff8803d1e77 SHA-256: d354598d2d9552fba340b11f5a747917a66f75f43616351403664e6c7a7f0350
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains numerous links to disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs likely lead to malicious content or further infection stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://synerhu.ru/uplcv?utm_term=what%27s+the+android+version+of+facetime PDF link annotation
    • https://gsm.company/ckfinder/userfiles/files/38214639170.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/mopepeniwadezijusabovo.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/files/files/xekebobanap.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/wewel.pdfIn PDF document text
    • https://akanaymatbaa.com/calisma2/files/uploads/madowumilovuvolawov.pdfIn PDF document text
    • http://24horasnoar.com.br/ckfinder/userfiles/files/lofaralofunogojene.pdfIn PDF document text
    • http://khmernative-rice.com/userfiles/file/80601211419.pdfIn PDF document text
    • https://masterjobintl.com/ckfinder/userfiles/files/24973966453.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132551bac085---15289429386.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/31216398068.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/32559178922.pdfIn PDF document text
    • http://lingvastar.z-i-g-z-a-g.com/userfiles/files/darudexetutumewikezifiso.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/bozaramufe.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/6c02b5067be5595ff974a37118facfc0/95176676533.pdfIn PDF document text
    • https://mattress-leader.com/media/wofipabakuxo.pdfIn PDF document text
    • http://bolt.fo/public_html/userfiles/files/jikanedo.pdfIn PDF document text
    • http://odessawa.com/userfiles/file/bumowamewunuvupaxozado.pdfIn PDF document text
    • http://kamakuralosgatos.com/uploads/files/fozajoniduzejazisogiw.pdfIn PDF document text
    • https://havilahbuilders.com/userfiles/file/16437514281.pdfIn PDF document text
    • http://hasanmasat.com/ckfinder/userfiles/files/jugenusi.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/mofomokawulodomugovibusun.pdfIn PDF document text
    • http://carmakers.cz/userfiles/files/471076246.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/xexogukijoxe.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_off0000b125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB125 10788 bytes
SHA-256: 5b6c044412afdcc3ea9f36213e830944d624e1498b6478dc1d7c7664bc1bacff
font_01_sfnt_off0000c9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E5 14824 bytes
SHA-256: 3740fc501fab751c44ab29c5930df6880a46fed0a527db48b7c333d0a7ab700a
font_02_sfnt_off0000ef46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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