Malicious PDF — malware analysis report

Static analysis result for SHA-256 fef34f089282d2a5…

MALICIOUS

PDF

71.8 KB Created: 2021-09-04 07:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d6bd9c32d602256aa58e24e6b890bb33 SHA-1: e4ff60e639733c77c3f83d3f96a02665aef8661b SHA-256: fef34f089282d2a5ecc76f1e7d650bb6dd430f98c1162ba5d72472dc5fbbd94a
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

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://www.tokyomagic.jp/images/library/File/rogebuvitinixoxinakenisu.pdf In PDF document text
    • http://goldenagegroup.vip/userfiles/file/nilukutojur.pdfIn PDF document text
    • http://championsview.net/userimages/63844818186.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/4ce7f57d3163fa42f89b525d14bfda7d/sibaresewosokijurulat.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988cfa787d0---zojupufigipasiwajigepalud.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/tnjl8qlvpkgvpns47tvahm1ntc/18833787862.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dbdc3a798f---24021599215.pdfIn PDF document text
    • https://lecachet.fr/docs/files/47453045543.pdfIn PDF document text
    • https://westhygiene.hu/editor_up/61330128898.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f0ccd2528---62629152932.pdfIn PDF document text
    • https://immobilgold.com/file/99770007004.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/d185f62b616ef665b795d81f00a57a7b/bivukapaxukosimefi.pdfIn PDF document text
    • https://fentesmakina.com/paket/upload/files/negutizekezexutovukisegos.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/77266314211.pdfIn PDF document text
    • https://parisnordmedical.fr/docs/file/97522036433.pdfIn PDF document text
    • https://badrivishal.com/media/19577807517.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f48f086887---3381846896.pdfIn PDF document text
    • https://banghenails.com/upload/file/55572111110.pdfIn PDF document text
    • http://ohsongpharm.com/ckfinder/userfiles/files/49164443624.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/6df61995e700f58ebd861a38dc10dffb/vunumanikujosobexelewo.pdfIn PDF document text
    • https://jdrum-music.com/uploads/ckfiles/files/7239571890.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/poximikuzadibojenomes.pdfIn PDF document text
    • http://mqskin.com/luutru/files/43915560112.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/7318a4db382b3e6f6d44bc88b69d7ff4/fatubegox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=pdfbox+preflight+validatePDF 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_off0000b6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6FA 10816 bytes
SHA-256: b5ad9478072b2540a334061c8d23671b54bb7b09c29dce93501e310981c6f726
font_01_sfnt_off0000cf96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF96 15792 bytes
SHA-256: d09e28db3971f2bcd9377ea7c386fb70314f7b2576f5b6e788cfd3735d2121ad
font_02_sfnt_off0000f817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF817 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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