Malicious PDF — malware analysis report

Static analysis result for SHA-256 9750c5d063d700df…

MALICIOUS

PDF

80.0 KB Created: 2021-03-31 03:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3b61cb2bbdd75453ed34494920871bf9 SHA-1: 55a3b48a584755a2db47482294eff8c3de1c8bcb SHA-256: 9750c5d063d700df58fb644fdbfaed15b7a9141590cbccfb641920985c944b00
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 0.9998

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://pelibifir.ru/123?utm_term=add+and+rename+worksheet+in+vba+excel PDF link annotation
    • http://padazaj.iblogger.org/ffx_2_blitzball_training_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415518/normal_60301a74b954c.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://pasorizafam.weebly.com/uploads/1/3/4/0/134096756/1482046.pdfIn PDF document text
    • https://vanazufir.weebly.com/uploads/1/3/2/7/132740694/7676418.pdfIn PDF document text
    • http://istlan.fun/39363050484y0cn6.pdfIn PDF document text
    • https://gidigodojuk.weebly.com/uploads/1/3/0/8/130874472/dodaludelo-deloto-puratodejap.pdfIn PDF document text
    • https://bixavovene.weebly.com/uploads/1/3/0/7/130775743/zuvasoxawise.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477183/normal_602f01e295176.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f452c1f-5cd9-4f2f-a903-c016367d0eea/descargar_caballo_de_troya_10_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/484277ab-c144-4589-93e3-ce7fb4325d81/iphone_6_plus_how_to_use_apple_pay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8e582d7-389b-4165-8be7-5cbf78079a21/76864827142.pdfIn PDF document text
    • http://wivonubezur.epizy.com/joker_harley_quinn_hd_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/maxoremunibi.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/cascada_de_coagulacion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f89a592-995a-42b7-89c1-df331bbd3084/dewomilerojo.pdfIn PDF document text
    • http://tukudapig.epizy.com/77390949556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c26c9bad-b8b4-415b-9b5a-651d827e51bf/87194806674.pdfIn PDF document text
    • http://parubixus.rf.gd/wixobepatunumonilojo.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/britannia_sustainability_report.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_off0000e487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE487 5592 bytes
SHA-256: 8f1d0f007266d27042cf5ee3fe62401e0d497f6fbfb73d174f05785f9cd6d17c
font_01_sfnt_off0000f77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77C 10952 bytes
SHA-256: ec994dc4872cfacd3b245b6c56ca7890809830e41f5009369ff639f7d13b6c9b
font_02_sfnt_off00011d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D41 16232 bytes
SHA-256: 1d4ebd634e9a4b1afc3ba2e660f7abdbad7ecfb3c20c2fb0daf688bec4f9a1d5

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