Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab6a8ed916045a9…

MALICIOUS

PDF

85.3 KB Created: 2021-03-19 21:48:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 635b9d5dca19e72d43f2b8073d3788df SHA-1: 303c9823f3389d215973e99f4dc99f0220bedcea SHA-256: 8ab6a8ed916045a9d3728a9992c8a51d97e078f461d4c3e557f9c1bc67d6fdb4
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 0.9993

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://lozipotod.ru/award?keyword=paula+isabel+allende+pdf+espa%25C3%25B1ol PDF link annotation
    • http://andyhong.blog/362104483937d8zh.pdfIn PDF document text
    • http://meetsalon.xyz/books_in_order_dan_brown8vb4m.pdfIn PDF document text
    • http://goodnaturak.space/tiponauzkzr.pdfIn PDF document text
    • http://mini-camera-super.club/9676489360943i1k.pdfIn PDF document text
    • http://kittyplay.online/3rd_grade_spelling_bee_wordsr47q5.pdfIn PDF document text
    • http://youtube-subscribes.com/african_female_warrior_names5fpmg.pdfIn PDF document text
    • http://milesnires.xyz/paxafejelhhg4.pdfIn PDF document text
    • http://terazelidokit.22web.org/xekejibewagepar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4c5ad993-366d-4b3a-aa99-9b6f56583180.filesusr.com/ugd/01e791_56d7849a0312475e9ffb17c4bf9114db.pdf?index=trueIn PDF document text
    • http://sifusavukaga.rf.gd/exerpeutic_900xl_300_lbs._weight_capacity_recumbent_exercise_bike.pdfIn PDF document text
    • http://punugituk.epizy.com/araria_map.pdfIn PDF document text
    • http://gisunoxep.rf.gd/naxarer.pdfIn PDF document text
    • http://xepalufozakot.epizy.com/platform_wedge_high_heels_shoes.pdfIn PDF document text
    • http://mavoweba.epizy.com/7773874917.pdfIn PDF document text
    • https://5f384421-c3d0-4b4c-85a6-d3745974446f.filesusr.com/ugd/40006b_189335599309426696afa72eaf6d1546.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/67ba6eca-6851-45ae-bf39-f1354eb5be34/63496932461.pdfIn PDF document text
    • https://7a579b3f-ce96-4c66-abdc-991530493d29.filesusr.com/ugd/010c6b_a549204f542e476ea6de8f36dbb39c66.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6346d18f-7c16-4040-aa80-ffe0476b78e7/how_to_begin_art.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45d078a8-03f9-499e-adc0-7dde516e4ff3/nalavoviwe.pdfIn PDF document text
    • http://momabuxamejuwev.rf.gd/fashion_brand_company_profile.pdfIn PDF document text
    • http://wisunomimat.epizy.com/39196727613.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efea91e6-2365-4bc1-a718-6c7b73c755e8/kijopame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58d91970-df6e-417c-b42c-9ef8a78a5ae2/what_kind_of_battery_does_g-shock_use.pdfIn PDF document text
    • http://tajapog.rf.gd/14789455599.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_off00010bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFD 5292 bytes
SHA-256: b6d2703bb8ac5849fe030738c7aa55b5bd0f5ec6bdf22a8944f7bc7ae6eff2e6
font_01_sfnt_off00011dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCC 12316 bytes
SHA-256: e51ac2d114901d75552b07efdbd1bcc1bcd89ff4f9988b39c2037aec43e24a9c

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