Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a584240d002785…

MALICIOUS

PDF

118.7 KB Created: 2021-04-02 01:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 32eaa4522d265803e9dacd403e702c05 SHA-1: 5f48f032690374dd64d6cc592a290ce9377bd26e SHA-256: e6a584240d002785b1dfd844940306632d32bd5f9cc5c91362d2c51ba9a37785
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many pointing to disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/award?keyword=history+of+early+childhood+education+in+zambia+pdf PDF link annotation
    • http://deutschebank-meine.com/echo_cs_400_chain78dvv.pdfIn PDF document text
    • http://ru-en.xyz/apk_bunny_live_apk_puret2w9p.pdfIn PDF document text
    • http://xivazokib.medianewsonline.com/automotive_wiring_and_electrical_systems_projects_tony_candela.pdfIn PDF document text
    • http://nout-prodat.site/wow_legion_affliction_warlock_guidefdhip.pdfIn PDF document text
    • http://sunny-web.ru/lagapebopex07out.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413473/normal_6045115daec28.pdfIn PDF document text
    • http://galabogenezoso.getenjoyment.net/colleges_with_interior_design_majors_in_virginia.pdfIn PDF document text
    • http://manibupefif.mypressonline.com/reading_and_writing_shs.pdfIn PDF document text
    • http://sogejovep.mypressonline.com/costing_methods_in_accounting.pdfIn PDF document text
    • http://extra-fon.ru/dell_760_ram_support1kimk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469135/normal_5feb87d9c3d94.pdfIn PDF document text
    • http://creamwalls.online/gupuzonepuomed0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://32b33340-d9da-4ef7-b3bd-a0ac5134eb71.filesusr.com/ugd/adfa6f_6f5b8a4bfc794bb28493fce8f9aa1e4f.pdf?index=trueIn PDF document text
    • https://6d428a25-da86-44fa-8f13-5b0f09742281.filesusr.com/ugd/3649d2_6ed378c083064e82b1f7d550ef5dda87.pdf?index=trueIn PDF document text
    • https://592908bf-dd96-48cc-88d9-ffebbdd10d84.filesusr.com/ugd/f34823_b32f5061e6684f458d6f43abdfcb7c75.pdf?index=trueIn PDF document text
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_a85bb88ba6414a95896f32efceb9e597.pdf?index=trueIn PDF document text
    • https://9f1be152-2ea1-4306-981d-bfff62ad382d.filesusr.com/ugd/08fb22_8fcea443ca2046fbb6d2ad6e35c3d019.pdf?index=trueIn PDF document text
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_d56eea4f24e84c36939a166ac06ec744.pdf?index=trueIn PDF document text
    • http://larovitivejel.atwebpages.com/linear_harmonic_oscillator.pdfIn PDF document text
    • https://8aa13d94-a051-4bfa-911d-5e7c2f772018.filesusr.com/ugd/382cc4_af08d20036504af5858206b6466fea8d.pdf?index=trueIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18408 5532 bytes
SHA-256: 090d97d3cec161c1af8ae76719eccacd816426dbae5790bf03b29ebea5dc2880
font_01_sfnt_off000196a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x196A2 12024 bytes
SHA-256: 0eee21781be2a5ccc559c20300315d802f63e79aed79af393a5d9452021c4eb9
font_02_sfnt_off0001be8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE8E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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