Malicious PDF — malware analysis report

Static analysis result for SHA-256 e01fa67b0d20a920…

MALICIOUS

PDF

89.2 KB Created: 2021-08-26 05:33:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d9d108dc33381e9254326b1533e2b21e SHA-1: 7aa33bdda017d82311ceb8386df394398f426f28 SHA-256: e01fa67b0d20a9207e97b1f38a9aa8645f4e24ae17c72304b4338e37c24cebd1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable hosting, suggesting it is used to distribute phishing content or further malware. The presence of external URIs and link farm heuristics strongly supports its role as a malicious redirection tool.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://oniceh.ru/uplcv?utm_term=f+pace+manual+transmission PDF link annotation
    • http://cateringkieuan.com/uploads/userfiles/file/23437607281.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dc6c29063a---tajowusitavobumu.pdfIn PDF document text
    • http://35ct1.com/images/ckImageFiles/files/87083186500.pdfIn PDF document text
    • http://sgo-bage.com/public/files/files/wosedugopafatobufaguroj.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16106ee9abe301---74632816361.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/c23ca033186d7496ca9438728f6a8a9f/dafotoraru.pdfIn PDF document text
    • http://hoanhaochemical.com/uploads/files/fibopitediwikafuwazenu.pdfIn PDF document text
    • http://vanillasky-ch.com/images/files/9957036834.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/5d183983ffa2170f2a00c04c8215755c/950042365.pdfIn PDF document text
    • http://chieucoingason.vn/files/galit.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/75a49qb5dd9tcq2osc3c56qbjb/bezazuku.pdfIn PDF document text
    • http://thefjordbaklawfirm.com/clients/876731/File/17951125930.pdfIn PDF document text
    • http://bulongvungtau.com/media/ftp/file/likitonekoxul.pdfIn PDF document text
    • http://sevenseahotel.com/uploads/images/files/jeriroranuxofojalil.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/39375021189.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/7265iagp65fj1tth31ppkkmlti/47330691972.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945a55065a6---jagewerejalox.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/27123803130.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16078d17f56864---97866621500.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/solipaxedaxelujujozunefo.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/577a6e8730498667e00af3315a978965/leripofabesogozezam.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f95e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95E 17940 bytes
SHA-256: 30c7ee993fb44f74ff2044a1253a103bac96ccb2e988e3d7ea1588e74d8681e9
font_02_sfnt_off0001281a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1281A 10612 bytes
SHA-256: bbfd542093dadad53837c434e36825682d68fed62d4745c05018474e8dd63a34
font_03_sfnt_off0001404e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1404E 16380 bytes
SHA-256: 51519c4a8e18b3b7337ece72dac33052d0e08e4515fbb781a95e0198ec25c057

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