Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2c0768b82d3234d…

MALICIOUS

PDF

67.1 KB Created: 2021-03-17 14:49:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: af1e6897c435db68b2add44d157c2916 SHA-1: cfeb42279d7481c2d03a93f69a5d3137e8fa8c32 SHA-256: d2c0768b82d3234d7e8b6998d7e7dac845c9797308d9fa6ae72e19f41a40c1f9
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://xajibur.ru/123?utm_term=adara+wadan+wallpapers PDF link annotation
    • https://xijozidirosem.weebly.com/uploads/1/3/4/7/134712871/numil_nazevuw.pdfIn PDF document text
    • https://laropavo.weebly.com/uploads/1/3/4/5/134585926/966149.pdfIn PDF document text
    • http://copyrightsupporthelpcenter.com/how_champions_think_to_winy0ss1.pdfIn PDF document text
    • https://lafajadisevo.weebly.com/uploads/1/3/1/4/131454770/19ba16f.pdfIn PDF document text
    • http://bupetud.xyz/looking_forward_to_get_your_answerm940f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392853/normal_5fdc4ea18b739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474218/normal_604957db5133d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411709/normal_6037beea0ed4e.pdfIn PDF document text
    • https://bawusazatodopam.weebly.com/uploads/1/3/1/3/131378774/topojit_xejidex_setotis_lasazum.pdfIn PDF document text
    • https://dususujere.weebly.com/uploads/1/3/6/0/136024938/ratej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454990/normal_6016f9f1512b3.pdfIn PDF document text
    • http://dominis.xyz/deveruxumuudfx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383561/normal_603415a7c228b.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/3e9ab1b3-66ed-43c2-b037-9cbc89a66442/que_es_la_linea_alba_anatomia.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/nefijoranu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6c20f45-215f-4f56-a794-34bf00fd6735/jojabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fac8a314-0352-4b6a-9898-cccd0a82f31c/how_are_artistic_skills_developed.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/54321405592.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/ocr_a_level_chemistry_textbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/what_are_dark_type_weaknesses.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/column_wise_report.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/osrs_chinning_guide_not_ape_atoll.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC5E 5032 bytes
SHA-256: 463450bf8bc42585190072d39e78b1d67a9f6982dd6cc1b71fcff93a07561b8f
font_01_sfnt_off0000dd97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD97 9856 bytes
SHA-256: 47094118e5bb054ba5738faa82c2877d1d6b70074af78b2dc6e7887060468202

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