Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ccb50c45a6d9253…

MALICIOUS

PDF

73.1 KB Created: 2021-09-04 10:55:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 937610cc54c161ce8091c76e89be01a8 SHA-1: 2be59f853f894bb9e856080af090561edd2ff732 SHA-256: 5ccb50c45a6d9253b8d31d625630d7672ae74d1e482f801330795bbb7483d08c
196 Risk Score

Malware Insights

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

This PDF document is flagged as malicious by multiple heuristics, including a high-confidence ML classifier and ClamAV. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document attempts to trick the user into installing a browser extension or update, a common tactic for credential theft or malware delivery. The numerous embedded URLs, many hosted on compromised CMS upload directories or disposable domains, suggest a phishing or malware distribution campaign. No scripts were extracted, but the overall structure and heuristics point to a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://angeladaniel.de/uploads/files/wobumisibe.pdf In PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/dde52c0cda1b543f35bbc3d16568f584/golutarox.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/12213832383.pdfIn PDF document text
    • http://ketoanaca.com/uploads/image/files/89308737424.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab97599ee6e---22882075838.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/af7fea92ffb34b8e73eccfefda2f7393/2903013743.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/9adielcgotot820lkpu7t10qge/zanagejojebumufebokagu.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/36459491625.pdfIn PDF document text
    • http://dade666.com/userfiles/202106file/2021061012575270554.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823ef1ee950---nokiruxevewinus.pdfIn PDF document text
    • https://anfauglir.com/images/file/nozobuzixareluk.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0faec71fd---rodemowo.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/079926f3a08f90aa79b7fd6d32dce205/dofiza.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/71452539144.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/6707f36e37376ac54554243921f1c59f/jigofik.pdfIn PDF document text
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca036e6048---lijizabumixumufoxedefafed.pdfIn PDF document text
    • https://piataafacerilor.ro/app/webroot/files/userfiles/files/64948658423.pdfIn PDF document text
    • http://marikitaberbagi.com/userfiles/file/22242675383.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/n8fkpomeeq76niukl3jlhl9tj2/bomib.pdfIn PDF document text
    • http://marketherballize.com/ckfinder/userfiles/files/gixiwud.pdfIn PDF document text
    • https://nasikampung.info/contents/files/belozibumageragelose.pdfIn PDF document text
    • http://onsijsselstein.nl/userfiles/files/18975888409.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/92298968171.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/0e2ea1d64abdd389b67017483f44941b/79787804208.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=reliance+transfer+switch+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_off0000ba5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA5E 10728 bytes
SHA-256: 19b52631322d9bf2ac989a36ecad9e5ec1aafe142b01dd64ab4667982f507226
font_01_sfnt_off0000d2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eb0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0D 16944 bytes
SHA-256: 00e8e6edb46282bf5fc0be63093643d02ca508f9a829f3cbf0cf7ec8d745195a

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