Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e67c2375dd1554f…

MALICIOUS

PDF

130.0 KB Created: 2021-06-01 16:29:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 47e4c59f946d1d797fad232f980a3c11 SHA-1: de7280ab5c347bbb2a6255e592d0833d436e180e SHA-256: 0e67c2375dd1554f3267b3e33ba73c79f0df3f5034aad5399f540f8641310ebd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file 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 pointing to compromised CMS upload directories and disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing attacks. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics strongly indicate an intent to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://huntic.ru/uplcv?utm_term=m+c+v+ka+full+form PDF link annotation
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/935a96a143e847a4cd136238cf0d98e5/malarotexusefafajikegi.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160815452484a0---37883466728.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a433483ba4f---xazifusabulupewuposef.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093ff13a4f59---26101837938.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608222d80ea9e---segomixibutawamoridi.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/gageterijawa.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/70669109213.pdfIn PDF document text
    • http://ridendo.cz/files/file/42040882896.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/pularokix.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/wagemik.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/91cvbq7iqddimhaees7qs0jb42/zaxivisokelo.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/3f42325ff212de0b54e22080826ec8ee/mimisakuli.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608877eb40edc---27735786605.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbe19a3f78---60592244511.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160affeca2c13e---22679478266.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/7da58d5l3r9u89ih1cqft5d0j7/46541237163.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/gubuzo.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/4e2eadb8674bab959973f5c71a332520/75840368243.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/16095c47f9d041---moxiruvabaxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018d2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D2A 3540 bytes
SHA-256: d609a3c73c67c3e0f83b42e16a0ccc2bd8eae8522d4e77aceaf91e505d6a60aa
font_01_sfnt_off000199dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x199DD 4980 bytes
SHA-256: b2d2bd14dd8124a31760645594a4f831124c3e3f000d4d9d548c23f7cf861b2e
font_02_sfnt_off0001aad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AAD3 11488 bytes
SHA-256: 8dd0fa0723eb856b29a6e090cb3177d126a880a862773322d38fda5c0ab34206
font_03_sfnt_off0001d0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D0B0 16096 bytes
SHA-256: 61761e6c71fdd980502ce8a3a8cbf9590216241eb9eabe72fdf309a1c23cd3c2
font_04_sfnt_off0001e5b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E5B5 5440 bytes
SHA-256: 9724364ab0edfebfeb79076fd5adb37d123eeec4786d515ead7fa068c10f1ea1

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