Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e1e04c0a9aaf04f…

MALICIOUS

PDF

81.2 KB Created: 2021-02-24 02:19:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: e3644fb48e6c7243b80f88248dd498be SHA-1: fa6dfd4198898fccb2e523ee7b98226204c625e2 SHA-256: 7e1e04c0a9aaf04f470c1b5dad72347c793fdc401b6d19b4b93c0e41dd2b3dd7
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The presence of numerous external URIs, many hosted on disposable domains, suggests a link farm designed to redirect users to potentially malicious content. The document body, though heavily obfuscated, contains metadata related to its creation, but no direct instructions or lures are discernible. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/wix?keyword=consecutive+exterior+angles+converse PDF link annotation
    • http://cpskras.website/lebisukexf16jc.pdfIn PDF document text
    • http://befemuvejizu.22web.org/forest_plot_software_free.pdfIn PDF document text
    • https://zukolarosaku.weebly.com/uploads/1/3/4/6/134662459/wuzimu.pdfIn PDF document text
    • http://tiktokhd.design/779116531299zxaa.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/CFgcojb/verizon_content_transfer_app_android_to_iphone.pdfIn PDF document text
    • http://mazafaka69pussy.online/health_assessment_in_nursing_6th_editionxg4to.pdfIn PDF document text
    • https://takaranedo.weebly.com/uploads/1/3/4/0/134017801/8063776.pdfIn PDF document text
    • https://jeduwenerapowi.weebly.com/uploads/1/3/4/6/134678879/5701279.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477181/normal_5fc9521604f77.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/UsIS2hc/48708337765.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366036/normal_5fdde9c377da1.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/wghg3id/mci_airport_gate_map.pdfIn PDF document text
    • https://bafizotadax.weebly.com/uploads/1/3/4/7/134761596/4390267.pdfIn PDF document text
    • http://nokobefisedo.iblogger.org/shawshank_redemption_movie_in_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwasazafu/ifFOjb1/foxovegudevalenose.pdfIn PDF document text
    • http://petersikdar.com/579639940384vhrn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418778/normal_602d99c0cd3d7.pdfIn PDF document text
    • http://gifozazupu.iblogger.org/anatomia_microscopica_de_la_medula_espinal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kagilabitivibe.epizy.com/labantwana_ba_wrong_song.pdfIn PDF document text
    • http://rijogutigoxek.epizy.com/31597904987.pdfIn PDF document text
    • http://tejujusaruke.epizy.com/authorized_representative_form_dpss.pdfIn PDF document text
    • http://zaniwemikadas.rf.gd/nitrogen_cycle_worksheet.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
    • 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_off0000ed11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED11 5000 bytes
SHA-256: 5e37a8a776295161067e7a4010c0194d568b1e477fd1d18923cedce960deb727
font_01_sfnt_off0000fe2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2C 10208 bytes
SHA-256: 4283e9e75ed07130c0a1e188bb6762cb84700af433557a1aebfc458ba896a9b4
font_02_sfnt_off00012145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12145 16256 bytes
SHA-256: a9c88cd7ae3f07a92a59388bc9cb240bcbc58b7b4991c09ff969e23ec4700260

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