Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c99210c0b907bf…

MALICIOUS

PDF

70.0 KB Created: 2021-02-18 05:36:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 71920d47589ecb567310bbc0905cbed9 SHA-1: ca93941f3b2366e0458e39aac1a5550d6e0213d1 SHA-256: 60c99210c0b907bf8fb24063e6c99c22f4082fa5a8e9174ef738b470feb3fb4c
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 0.9997

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://leonvi.ru/123?utm_term=accu+chek+performa+error+code+e6 PDF link annotation
    • http://tumerasiwabuzip.22web.org/cells_alive_bacterial_cell_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/visesefider/heXZjiY/miwifagekulokimalupeve.pdfIn PDF document text
    • https://cdn.sqhk.co/gozigawefo/hb9ACjb/super_mario_unblocked_games_77.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/ijfG1hd/radigeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412887/normal_5fe7a86f42531.pdfIn PDF document text
    • http://figupatofewox.iblogger.org/vita_henkaku_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379961/normal_602ddb3a26d4a.pdfIn PDF document text
    • http://kubevevof.iblogger.org/mp_bsc_online_form_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/tokafumotebi/TCihnji/49559205088.pdfIn PDF document text
    • http://bestpriceforukraine.xyz/edge_of_the_empiretyzrk.pdfIn PDF document text
    • http://businesslinecenter.com/biduzatonagotom75rv4.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/o7f04hj/jemugeletez.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/jjgdajh/plus_messenger_2020_for_pc_windows.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luwegovufa.epizy.com/defekadakilaxo.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A1 5392 bytes
SHA-256: c49450a0aeb81e18816f54d1ff9562f8d54920d7e1e45906d5426af38296b690
font_01_sfnt_off0000e8d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D2 10068 bytes
SHA-256: 8f25b42a3c9c391f6cbe290985a97d4e2d354ad1c5e3900375b3a27caaebd572

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