Malicious PDF — malware analysis report

Static analysis result for SHA-256 e10645f45f8e8d46…

MALICIOUS

PDF

81.2 KB Created: 2021-09-01 17:50:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: df6945d820810077adda4adec83f4fa6 SHA-1: e03e6bbeca0d316c3d1dcf0eed39d37125081aa4 SHA-256: e10645f45f8e8d46fe886c6b19cc1717563dfd1c5f6c2d682a3982de490a3ab7
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 or trojan delivery mechanism. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting an attempt to host malicious content or redirect users to phishing pages. The heuristic 'SE_CALLBACK_LURE' indicates the document may also be designed to trick users into calling a fraudulent support number.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://irlanc.ru/uplcv?utm_term=authorization+letter+to+terminate+internet+account PDF link annotation
    • http://jshtextile.com/UserFiles/file///nasogewumubizobodepirixe.pdfIn PDF document text
    • http://eichler-kammerer.de/fixuwarudalunenozisise.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/fozevopu.pdfIn PDF document text
    • http://suachuabaoduongmaynenkhi.com/img_quanganh/files/pobapirafugubofil.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/jg2a7o25bto9atg3p0lcbm8765/26644811768.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160bc066703b31---10663691356.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112bc7c205f2---80728759936.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/furevijunubaxu.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/0551b59e8b066487361b8feae8933237/12783194136.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/munilu.pdfIn PDF document text
    • http://mgtuae.com/uploads/file/ganuladewit.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/430a2d3668472c268a1b79b4e1d6d5af/98150884520.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/soxilosidawulomeja.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/7e5099e457d0c192b649ffa65ed52d61/salesemufola.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/c8d748212b4fb5ccf24962a008e8351b/xidijufepatos.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607205e6cf58f---39970503358.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/6873018558.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/807b46ac6b1b3523eb4e69d3f32404ae/3464398626.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/tijokinoremanadatas.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/kezegus.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160962566110be---73504503416.pdfIn PDF document text
    • https://ermolino.mebel18.com/uploads/files/ludibusidelagisononabixe.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_off0000d836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD836 18112 bytes
SHA-256: 540a4aa80a4d8b51072a2a2883831aa0687fcce02c75f053510d7af0632858c5
font_01_sfnt_off000106ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EE 10468 bytes
SHA-256: 1ad47f65e9ff1913d00520648e111da6f1abb3e4b4da3f4bacccd0beda97ee47
font_02_sfnt_off00011e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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