Malicious PDF — malware analysis report

Static analysis result for SHA-256 00fe2480bbeb4348…

MALICIOUS

PDF

75.0 KB Created: 2021-09-18 06:57:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4c715c00fac184594f181702cff8898b SHA-1: d9891ab5360b87564d02a537dc498d800c06b572 SHA-256: 00fe2480bbeb43489fdca447d58dd3efa884f00d7067cf1fb88e77ea2a9919ea
184 Risk Score

Malware Insights

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

This PDF document contains embedded JavaScript and numerous external links, many pointing to compromised CMS uploads or disposable hosting, indicating a malicious intent to redirect users to potentially harmful content. The presence of a callback lure heuristic suggests the document is designed to trick users into contacting a fraudulent service, likely for phishing or scam purposes. The ML classifier and ClamAV detection strongly support its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://inwebjor.ru/uplcv?utm_term=non+rooted+hack+apk PDF link annotation
    • http://thaimassageboy.com/ckfinder/userfiles/files/juvukizitizosato.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/52706455692.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/1a814a4ba4b04890263c1d5024ac2462/rojet.pdfIn PDF document text
    • https://happycondo.leaddeehub.com/userfiles/files/77687757734.pdfIn PDF document text
    • http://fitviewer.biz/files/file/129661039.pdfIn PDF document text
    • http://cioccolatogallucci.it/userfiles/file/wubanilalarowaso.pdfIn PDF document text
    • http://studioagm.it/userfiles/files/fuduwuwexo.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/ff2d8gdrfvm5mnom2dn232cv8n/10919223780.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/8041d5fe9ac5ba1f0820b33158f32066/80418198886.pdfIn PDF document text
    • https://haruhonpo.com/upload/haruhonpo/files/zuxomejetirezi.pdfIn PDF document text
    • http://www.dagmarsvendova.cz/admin/js/ckfinder/userfiles/files/jobenotodugaramevaluje.pdfIn PDF document text
    • http://ziva-muzika.cz/files/file/pelubixelepigama.pdfIn PDF document text
    • http://branonperformance.com/ckfinder/userfiles/files/velelapuzemosex.pdfIn PDF document text
    • https://congtydaihai.com/upload/files/resimutisawaw.pdfIn PDF document text
    • https://szamitogep-szerviz-javitas.hu/ckfinder/userfiles/files/89682282521.pdfIn PDF document text
    • http://studiospazioambiente.it/userfiles/files/lafisimuvoratizilepurujix.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/kilusonunuvijariwofuforo.pdfIn PDF document text
    • http://iccarrentals.com/files/file/89301653781.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/52284353113.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/bef363fbffd2b11b164ddf3973d93c93/lawipidokigumufut.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131f5c85115d---wapowafitivevofa.pdfIn PDF document text
    • https://goodmix-psc.com/userfiles/files/fumazotetepofo.pdfIn PDF document text
    • http://1000projects.ru/upload_picture/file/90465856286.pdfIn PDF document text
    • http://sov.tranovice.org/webpagebuilder/ckfinder/userfiles/files/34669000626.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_off0000c218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC218 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2F 10376 bytes
SHA-256: 0fb33e9e7557e264617031816fd45d881705dc4aa8db64805c86ca6dc9c3a5b8
font_02_sfnt_off0000f18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18E 17396 bytes
SHA-256: d9392d7e9339bf94fa92e64a4181feba420f1169595c076159f7fd1e636aa02d

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