Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd674003c654ebe1…

MALICIOUS

PDF

73.6 KB Created: 2021-04-05 18:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: cc8a259b3bb04d0d8782bf9957588098 SHA-1: 50944db5673319dc1139f1ead81115913ca1c2c2 SHA-256: cd674003c654ebe1f4e524da2aa8e5166956fdd9a703294be4c7ad7a36dd3179
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/award?keyword=lightning+arrester+working+principle+pdf PDF link annotation
    • https://cdn.sqhk.co/vulasobifow/iaFgFnm/new_hire_announcement_powerpoint_template.pdfIn PDF document text
    • http://im-marceting.site/28084572095f859i.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/I8gdn6w/6271102537.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382960/normal_602f10d1600b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_604504a07e58f.pdfIn PDF document text
    • https://cdn.sqhk.co/liwewajawab/1dIjfSg/jobamikuvil.pdfIn PDF document text
    • http://app-3null.com/47768785540pvo0b.pdfIn PDF document text
    • https://cdn.sqhk.co/fabunavaxa/eZxdcVn/lucky_draw_bingo.pdfIn PDF document text
    • https://cdn.sqhk.co/felebamifuk/hThi3a6/21524631530.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490141/normal_60652b8dc6abf.pdfIn PDF document text
    • https://cdn.sqhk.co/xubewarow/fjdjajj/collage_maker_online_free_with_effects.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/0ihZQgg/pomijule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391308/normal_603e53a33769e.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/icgifjm/51394495869.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478932/normal_605dcbf3ca265.pdfIn PDF document text
    • http://giocodigital.space/59310819103wdaox.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/f118a1b4-8f6e-4d94-b05b-b0f830967d33/samsung_galaxy_note_3_price_in_pakistan_2013.pdfIn PDF document text
    • http://ponazuxunuruko.rf.gd/salasaral.pdfIn PDF document text
    • http://masupes.rf.gd/this_is_amazing_grace_song_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03acf6d0-7b60-4e14-aad1-c6bd1a3668e0/suveboburivur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23105f04-a944-47b1-86d3-a8aa48f4da40/15761506694.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_off0000e51e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51E 5516 bytes
SHA-256: 848de086fb11b90155ad84a8adc93d4bdefa9706bf1a766b1077261e4d1f13df
font_01_sfnt_off0000f7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F6 9664 bytes
SHA-256: c05d4e544008ee7a69f56ac8d5e92d716e9042e4be8db9c708906f068805c5f7

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