Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cfa71ff73a92672…

MALICIOUS

PDF

83.1 KB Created: 2021-03-28 08:38:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c87d37d0202e6842233b7c1650432a86 SHA-1: 8eb269d9a4f868d31aa8a9f157f6e583d62a75e9 SHA-256: 7cfa71ff73a9267230d2a232b7512b2ef7b84292ed20a4aeecd046314a7b3240
166 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including ML classification and ClamAV detection. It also features a 'Password-protected archive handoff' heuristic, suggesting the document's purpose is to trick users into downloading an encrypted payload. The embedded URI points to a suspicious domain, likely part of the lure to obtain the password-protected archive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://jumiwimov.ru/wix?keyword=desert+shadows+middle+school+pto PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408871/normal_5febc05f6e1b5.pdfIn PDF document text
    • http://idealica-ufficiale.site/dafopivus5rvzb.pdfIn PDF document text
    • http://shopyou.online/diana_russell_feminicidiovgmh1.pdfIn PDF document text
    • http://neo-tp.ru/unsecured_notes_payable_on_balance_sheet7gu5p.pdfIn PDF document text
    • http://goldotzyv.ru/quality_management_tools_and_techniques1t81g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483602/normal_5ff009f730ee5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370286/normal_601627d5e917c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483589/normal_5fd897dd7e683.pdfIn PDF document text
    • http://lifeit.pro/journal_of_biomedical_and_health_informatics_template89r7c.pdfIn PDF document text
    • http://wobirarebi.22web.org/harry_potter_and_the_goblet_of_fire_full_movie_dailymotion_part_2.pdfIn PDF document text
    • http://depupejaxidolip.22web.org/46034374513.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403283/normal_605b8b635cbde.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wewodiluxi.rf.gd/evangelios_apocrifos_nag_hammadi.pdfIn PDF document text
    • https://a146b927-ed54-472d-b3a8-6b137e313b92.filesusr.com/ugd/4d400c_7035fc8db03648f1a21c500a705a28ae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pisik/23931227984.pdfIn PDF document text
    • http://vinuwivuko.rf.gd/allen_bradley_powerflex_4_manual.pdfIn PDF document text
    • https://a40b6db0-1679-4e03-879f-ac5827b9aa7d.filesusr.com/ugd/dba42a_4bce4d0baa7a42bc8547bfb521642568.pdf?index=trueIn PDF document text
    • https://72dfff08-f6cb-4f5d-aaac-ebe71175d6a6.filesusr.com/ugd/c268f7_fc1135556c1b4a4d96d11b4fe1942702.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/juvipinoripakogavuf.pdfIn PDF document text
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_e5d1af78ec0941a8b982b94180876099.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/panokojol/pezatebefeda.pdfIn PDF document text
    • http://mimegovo.epizy.com/windows_10_setup_tool_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/que_es_una_imagen_corporativa.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/53157060068.pdfIn PDF document text
    • http://pikotesewelum.epizy.com/ralotubusijigulujej.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B5 3080 bytes
SHA-256: 3ea9dc0fe5daeba8b7c1286de8752a991578e51b79301a8010be3d8f06b4997c
font_01_sfnt_off000101bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BD 5404 bytes
SHA-256: 7d80a0a6b20c51bef37f5b552ed8d4478ff0aa8bc4796c2155b74072342068a9
font_02_sfnt_off0001140c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1140C 12308 bytes
SHA-256: d5ad97ccfee86d927bbe8f033e0d52b4964049af2df03ee26bebb60d68046900