Malicious PDF — malware analysis report

Static analysis result for SHA-256 d95b8b78bbbf5dea…

MALICIOUS

PDF

79.8 KB Created: 2021-02-16 11:14:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9b224e8be0ed2acecf90fc99cb7deef5 SHA-1: a7616a8b6db595fbb79286dcc43a85661a1d6ba4 SHA-256: d95b8b78bbbf5dea43af52c386538ebce980fbe560cb1822b12836595fba11fd
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-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://leonvi.ru/strik?utm_term=who+makes+kenmore+elite+refrigerators+2020 PDF link annotation
    • http://trendmobile.ru/vertigo_full_movie_480pumrlx.pdfIn PDF document text
    • http://tamakar.xyz/how_to_get_specialty_certification_in_nursing347j8.pdfIn PDF document text
    • http://shoop-fp.ru/gulabi_aankhen_remix_mp3_download6fj23.pdfIn PDF document text
    • http://labiosdewonda.com/hospital_infection_control_committee_aiimsvw019.pdfIn PDF document text
    • https://cdn.sqhk.co/vobevufubito/ighsifd/50810086792.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495843/normal_5ff5be0a1502a.pdfIn PDF document text
    • http://govnososal.xyz/recurring_decimals_to_fractions_worksheet_and_answersttpb9.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/ibijzjd/44120021881.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/2jb7gg7/34974389996.pdfIn PDF document text
    • http://paktum.pro/48983820060e4dlw.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/jhhehct/55779300897.pdfIn PDF document text
    • http://gtomishebs.xyz/hakuouki_hekketsuroku_episodesd7u0g.pdfIn PDF document text
    • http://italysummer.fun/13351876832g0az.pdfIn PDF document text
    • http://how2clever.com/asymptotes_common_core_algebra_2_homework_answersoc39y.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB72 5320 bytes
SHA-256: 7838ca7b8643c67e8fe223bebde878ad2891959479ba4cb7dfb9c68578ec6a82
font_01_sfnt_off0000fd62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD62 11456 bytes
SHA-256: 3ddfa596d5882364b229c4dab6f652dda89b22b10242a0231bd781ceb31ba29b
font_02_sfnt_off00012440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12440 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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