Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f7dc83e85621160…

MALICIOUS

PDF

80.1 KB Created: 2021-02-28 09:17:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5e0ba13c66297859f66d15901dce0f8f SHA-1: 530ea7f493442d6a0e3e2ae07ab7c6dfbae19bdc SHA-256: 1f7dc83e8562116010e53916475da53bdee2692111c45c3f6d452ae69fb63e1f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/aws?utm_term=descargar+zacarias+ferreira PDF link annotation
    • http://new-leggins.site/ps4_lag_switchkkl3r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530070/normal_5fee1933e6b5d.pdfIn PDF document text
    • https://minadefimufev.weebly.com/uploads/1/3/4/6/134635785/xosaw.pdfIn PDF document text
    • http://rasprodavaika.ru/apache_maven_free_for_windows7xr4v.pdfIn PDF document text
    • http://skidki-day.shop/conan_exiles_best_healing9orle.pdfIn PDF document text
    • http://bossyonlinex.com/avabel_lupinus_acolyte_guide9t3kn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404975/normal_6024ffeb0c13b.pdfIn PDF document text
    • https://gewewipuno.weebly.com/uploads/1/3/0/7/130775766/7889252.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368477/normal_5fe9b8784c1e0.pdfIn PDF document text
    • http://tiktokcopyrighthelpteam.com/delf_b1_junior_scolaire_downloadc22il.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450355/normal_5ff0da4ec3dbf.pdfIn PDF document text
    • http://istlan.space/chandrayaan_2_in_marathi_information740lq.pdfIn PDF document text
    • http://usacreditcheck.info/tenant_routine_inspection_report_form_285w159.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370555/normal_6030a3e8940ce.pdfIn PDF document text
    • http://metaleagle.ru/grade_5_english_worksheetsvoxfp.pdfIn PDF document text
    • http://legiontry.online/9076506324gzsgl.pdfIn PDF document text
    • http://rubeatyshop.xyz/chikati_gadilo_chithakotudu_in_movierulzfin96.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD814 5064 bytes
SHA-256: c8ebb2f5d26247afd5666b5fe111e0977e0285c2840d54c7ebabfcb646a0eb24
font_01_sfnt_off0000e96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96A 3596 bytes
SHA-256: 860f583a3db5076b4d5246534f6e4705cfee57e8e5a41a43e406380f7487a10f
font_02_sfnt_off0000f754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF754 10992 bytes
SHA-256: 5b3ff2d35f9045fc45639997712617912ac5a831cc2ac60ce6e650891292f6a2
font_03_sfnt_off00011c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C85 16476 bytes
SHA-256: 99f96896fa0fdf2faa972458c896ff19eba737119c7baf7f5847b5cb5e1f85ec

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