Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6afe65cc934807c…

MALICIOUS

PDF

78.6 KB Created: 2021-09-28 11:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 09fca9fda5a8f5c1be062b4f5da8dbd4 SHA-1: fe2ad020080d5c4aea28817304dba959bbe71035 SHA-256: e6afe65cc934807c18f49cad945668cdc64e3702b8c7936b006f13d33d13cdf0
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains. The heuristic 'PDF_RANDOM_URL_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection or download of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • 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://philabc.ru/uplcv?utm_term=ultfone+android+data+recovery PDF link annotation
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16149c86d28dec---71250465198.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/tiweromimotof.pdfIn PDF document text
    • http://ambulatorioveterinariobubiniregini.eu/userfiles/files/gexiruvamewabomosekanadu.pdfIn PDF document text
    • http://www.enredmail.com/templates/files/idCliente_/file/moxavoborugipibipiro.pdfIn PDF document text
    • https://tjpapigroup3.com/contents/files/vevegimuxafejitozek.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/dakawakoso.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/jopatisigizivavi.pdfIn PDF document text
    • http://pitin-akutsu.com/js/upload/files/benoxodobigasimomo.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/93391326655.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16148197b4ed6b---giletobalop.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613595803aefa---29208880012.pdfIn PDF document text
    • http://donovaly-ubytovanie-safran.sk/web/userfiles/file/wetow.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614f59192adbf---8441358239.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145c4c1e014d---76299715821.pdfIn PDF document text
    • http://op-gold.com/ck_image/files/fetajipige.pdfIn PDF document text
    • https://miet.hu/kepek/37272193732.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/98113314803.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc8355b397---busuzibegogujuwopudiroxod.pdfIn PDF document text
    • http://mottaing.eu/userfiles/files/56924322418.pdfIn PDF document text
    • http://crescentcarpets.com/userfiles/file/mosodiwona.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/6a1e9ceff0d1aa4e675c0a2de1527e74/60889713718.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161402b2e5ff08---99961865598.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/wenefolakedofapeven.pdfIn PDF document text
    • http://rambud.pl/uploaded/file/xosiboze.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_off0000c98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC98D 19604 bytes
SHA-256: e7e2ea5a8ae6121b44518be37acf39619136bc3d77e1db8cca903d81d4b38b7e
font_01_sfnt_off0000fccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E6 10488 bytes
SHA-256: 9125af515782dc6aeef92e5f284c6166b7d458285b60c39817460df3100cbe16

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