Malicious PDF — malware analysis report

Static analysis result for SHA-256 b51507b97acf8248…

MALICIOUS

PDF

77.6 KB Created: 2021-03-24 01:25:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 98fb9b94a3cf228481fe9a8ccb7a2352 SHA-1: a62451724b6d6a286e4ddf21cc6a1e164b8afa4a SHA-256: b51507b97acf82485d0cda9562835ee5937dcd85db3b26e38286dcd51034130b
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though partially corrupted, contains text related to "Foxit editor crack", suggesting a social engineering lure. The embedded URLs, particularly 'https://botokaw.ru/strik?utm_term=foxit+editor+crack', likely serve as download or redirection points for malicious payloads, aligning with a phishing or malware distribution attack pattern.

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://botokaw.ru/strik?utm_term=foxit+editor+crack PDF link annotation
    • http://geminomigokur.iblogger.org/54090429106.pdfIn PDF document text
    • http://kapimivibix.22web.org/29046423110.pdfIn PDF document text
    • http://alteramaks.world/53556770369yw74r.pdfIn PDF document text
    • http://optamorem.com/report_card_geo_news_scheduleyyy4j.pdfIn PDF document text
    • http://bufo.online/86860391219s2bch.pdfIn PDF document text
    • http://jozipuvuwuzaj.mywebcommunity.org/41125288407.pdfIn PDF document text
    • https://cdn.sqhk.co/lamajemomu/gcihqjf/voworujupozokuzuse.pdfIn PDF document text
    • https://cdn.sqhk.co/wexufenu/hblfYjj/gipufilukukunifewavukok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7ed754b6-a209-4558-9281-0032c7ee8ade.filesusr.com/ugd/4329d7_1e49465021444b9fad41ed01f29d9734.pdf?index=trueIn PDF document text
    • https://160e4e15-e27a-4ef2-9b26-f67fc0969a86.filesusr.com/ugd/cbdbb6_7dd453aba51a4d82b0bfae8a0812dab3.pdf?index=trueIn PDF document text
    • http://vekisofekibote.myartsonline.com/epidemiologi_penyakit_jantung_koroner_di_indonesia.pdfIn PDF document text
    • http://jowokepo.atwebpages.com/fuluwuxogego.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/9948835066.pdfIn PDF document text
    • https://ac685e6e-6442-44c0-91a1-b3a367e79ef2.filesusr.com/ugd/ce77c6_b60fe5193e1243eb84c6d11d0c4765b5.pdf?index=trueIn PDF document text
    • http://bakutogigu.rf.gd/zaletokeb.pdfIn PDF document text
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_5792c5a69da84f16bdd7e1f928acfebc.pdf?index=trueIn PDF document text
    • https://562a32fb-e9c8-4d8f-ac7e-a760da58c396.filesusr.com/ugd/68ec97_ecb250855a7745299b23fb9ad1e8a302.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/astell_kern_ak100_mk2_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_off0000f223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF223 4812 bytes
SHA-256: b6b84fdc6f55dbe3da3a19ab3bd7afbe00c4bef4695fca5a6734c8064d468c9b
font_01_sfnt_off00010294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10294 11380 bytes
SHA-256: 1745e9509edf4dc56b0df5c55ef06423699e4b027746da1c5541df137cceb42d

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