Malicious PDF — malware analysis report

Static analysis result for SHA-256 318716693a2909e6…

MALICIOUS

PDF

77.7 KB Created: 2021-09-08 09:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 94610d413ff2953934a0a3e69050bfd0 SHA-1: 32a6a0889ab454598035c3d21d49a4417ee4f9d6 SHA-256: 318716693a2909e6f00ffa489996629dbf3ba833c99600d37c7cf4fe4a897ec9
172 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports a lure-based attack pattern. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pixomot.ru/uplcv?utm_term=tutorialspoint+c%2B%2B+tutorial+pdf+free+download PDF link annotation
    • http://isdoor.ru/uploads/files/sanugemaxefipus.pdfIn PDF document text
    • http://art-ball.net/files/file/98776714901.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860ab42fa88---70911461921.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/17761447962.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160917bfca66e2---vajafopuk.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5058c225952e98c99c54e8707fa3cb52/xapitamixepe.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8cdca7215---favebukafasemejibirab.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/diwap.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/49157469672.pdfIn PDF document text
    • http://kme-kme.cz/files/file/zimugedomudorezijosiga.pdfIn PDF document text
    • https://perfecthospital.net/ckfinder/userfiles/files/tedesawurig.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/5c035b5bb2e071ad4ee54a1e7a2e65dd/83201909252.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d21b1c808---kabawa.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/kukematifasovago.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c9e6031619f---tikimomekomepiguwokubo.pdfIn PDF document text
    • http://luyenthitoeic.info/userfiles/file/dololojewagedivijakinim.pdfIn PDF document text
    • http://hotspot-usa.com/js/upload/files/44191896460.pdfIn PDF document text
    • http://alwaditrading.com/userfiles/files/zegusedudises.pdfIn PDF document text
    • https://delta-relay.be/userfiles/file/98572075597.pdfIn PDF document text
    • http://limeitec.com/upfiles/editor/files/tikuloj.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/lnovu9i8hsqbt7rb03qk43cgmc/14128598323.pdfIn PDF document text
    • http://citysuji.com/ckfinder/userfiles/files/97314837397.pdfIn PDF document text
    • https://iva-vietnam.com/userfiles/file/3669039038.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_off0000c7fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FC 10764 bytes
SHA-256: 9c2b280547e18444bfa4739b38a108a9df2f67336c706ad9ba3c6e73b18ac6ed
font_01_sfnt_off0000e0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F1 18248 bytes
SHA-256: 37e1ff9ac1a50df67f35b076bae9fb8ff5a0fc4d889f24d7ceb357a67742dc33
font_02_sfnt_off00011094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11094 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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