Malicious PDF — malware analysis report

Static analysis result for SHA-256 b01257955be613c6…

MALICIOUS

PDF

75.2 KB Created: 2021-09-25 10:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d832f14b2d7c5bcbda52054bdfa27bc1 SHA-1: eb22034c022f5dafffd337becb6c39e2ff272a6c SHA-256: b01257955be613c6cdff060bc6aec83bbd39e0e5de78648f0a08f765eb5afecf
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the overall structure indicate an attempt to exploit users via a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://phutungvespaco.com/luutru/files/pawub.pdf In PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143f9e259958---bazijokuxusiginedetizawar.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202109file/2021091620023370554.pdfIn PDF document text
    • https://lifeteacher.tw/uploads/files/202109201751075118.pdfIn PDF document text
    • https://piataafacerilor.ro/app/webroot/files/userfiles/files/nekunevoxusogu.pdfIn PDF document text
    • https://textosolutionslinguistiques.com/upload/editor/file/sedelolekixijofutirunipig.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/gupazosoxufuxipuvuv.pdfIn PDF document text
    • http://sk-uralstroy.ru/uploads/files/70932130591.pdfIn PDF document text
    • http://vatlieubaooncachnhiet.com/userfiles/file/8871438388.pdfIn PDF document text
    • http://rund-sro.cz/UserFiles/File/fomurigowoxanotibovu.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/e6b1e2d79b3cf138ea7e5c0dde36d2cd/30917879564.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/12470621967.pdfIn PDF document text
    • http://sprinter-lab.ru/content/File/muzuzivejodubu.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/51973616205.pdfIn PDF document text
    • http://studiomistretta.com/userfiles/files/tosopaduti.pdfIn PDF document text
    • http://liyangah.com/Upload/file/68595115201.pdfIn PDF document text
    • http://materialdeestudo.top/userfiles/files/38177513022.pdfIn PDF document text
    • https://tigaintan.com/contents/files/zaweburaxuzot.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210913203503.pdfIn PDF document text
    • https://drakbera.com/ckeditor/ckfinder/userfiles/files/dazakudab.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202109/file/vinabodibamaxo.pdfIn PDF document text
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/gikitazuje.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614732032adc2---jadifobozonodov.pdfIn PDF document text
    • http://kgmda.com/upload/files/bemajimudux.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/41964455528.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=la+poetica+de+la+enso%C3%B1acion+pdfPDF 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_off0000bcb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C5 18588 bytes
SHA-256: 85b14fa2cf1c243a1b4fd1bf4f6060c8302bf9c6ebc8d45c13701cfcb780db91
font_02_sfnt_off0001049f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049F 10676 bytes
SHA-256: d923e6392107aa1951f339873af2a4133c386f6ffeb3340e07d1e968e6465c6a

Open this report in the interactive analyzer, or submit your own file for analysis.