Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d5df2202bec1fec…

MALICIOUS

PDF

71.0 KB Created: 2021-05-18 20:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 340bda30cbe258bbbfacc9dd6fcd0cbc SHA-1: 88d3d1878024f2a156c1796f34a357e22b6170fe SHA-256: 1d5df2202bec1fec204f1a00b16b657eb6161dece6ae4067174b4249880d2f3f
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://soxebez.ru/strik?utm_term=ativador+windows+7+ultimate+64+bits+2018+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413978/normal_604b8c4383330.pdfIn PDF document text
    • https://bufazori.weebly.com/uploads/1/3/4/3/134377245/malibofen_gizijurus_suboputuxafipet_zugegibitop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468261/normal_5fe6a092b5cc2.pdfIn PDF document text
    • https://wimiwimevodozaz.weebly.com/uploads/1/3/0/8/130874111/8347406.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403556/normal_60052b0abc5fe.pdfIn PDF document text
    • https://sedezexe.weebly.com/uploads/1/3/4/3/134342112/7719827.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497368/normal_5fc9d628b7784.pdfIn PDF document text
    • http://dazudur.22web.org/analisis_bromatologico_definicion.pdfIn PDF document text
    • https://nifusesoporiw.weebly.com/uploads/1/3/5/3/135309858/vovikugata.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388183/normal_602097acc2306.pdfIn PDF document text
    • https://dubebonu.weebly.com/uploads/1/3/0/8/130874554/5619c0fff4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499285/normal_601985858a367.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369643/normal_5feb9877e8a2e.pdfIn PDF document text
    • https://nedidibizexoba.weebly.com/uploads/1/3/0/9/130969065/nisixera.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383806/normal_5fd6f2a2e2069.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423137/normal_6003c1da12d81.pdfIn PDF document text
    • http://rutonujak.iblogger.org/balance_sheet_meaning_and_definition.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/23abee20-71dc-4234-ae1f-5f3afe234343/interview_questions_and_answers_for_teacher_assistant.pdfIn PDF document text
    • http://tarodemeja.rf.gd/bovine_serum_albumin.pdfIn PDF document text
    • http://mevumum.epizy.com/lupiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61061172-f04e-4ded-80ec-4d14689a568e/what_does_the_queen_mab_speech_tell_us_about_mercutio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12e07d44-4c6e-4e3a-91c6-dec8e1737f0b/yamaha_rx-a820_service_manual.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_off0000d1b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B8 6096 bytes
SHA-256: 5c88fb753bdfe321b846815759154ab75a55a71a1be76585f156ef73bad8e68c
font_01_sfnt_off0000e685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE685 11924 bytes
SHA-256: 7e29161c5c70adbd82e0b917537fbaa2ba3375ff62b17a400a54d5f5f7ce48f7

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