Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee6abc43534261d8…

MALICIOUS

PDF

77.3 KB Created: 2021-04-15 02:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01891198c459c8ec28f9efc4e19d43de SHA-1: 738e5278599b697b0f898a76ce07c7722c1c2d09 SHA-256: ee6abc43534261d850de31e32a53d5805d3f44fe12a94db0585ae8c7ad79fe46
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary suspicious URL identified as a potential phishing or malware distribution point. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'Garmin 541s troubleshooting', aligning with the identified suspicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/strik?utm_term=garmin+541s+troubleshooting
    • https://cdn-cms.f-static.net/uploads/4378641/normal_5fdc45af4de16.pdf
    • http://ziposodepow.mywebcommunity.org/attahiyat_surah_in_tamil.pdf
    • http://suruwafid.22web.org/printable_weekly_menu_planner.pdf
    • https://cdn.sqhk.co/sarowojep/ghaHjgE/83121226086.pdf
    • http://gokawojop.scienceontheweb.net/is_the_5th_wave_a_good_book.pdf
    • http://niwadeg.mywebcommunity.org/85080605350.pdf
    • https://cdn.sqhk.co/wofetewa/b7RQIip/cash_app_sign_up_without_bank_account.pdf
    • https://cdn-cms.f-static.net/uploads/4425917/normal_605ef54f015f6.pdf
    • http://zoguponuwuxoli.medianewsonline.com/cub_cadet_lt1050_deck_belt_keeps_coming_off.pdf
    • https://cdn-cms.f-static.net/uploads/4448332/normal_60340e1fe771c.pdf
    • https://static.s123-cdn-static.com/uploads/4479917/normal_6008635212f28.pdf
    • https://static.s123-cdn-static.com/uploads/4458413/normal_5fddb65fac656.pdf
    • https://cdn.sqhk.co/fanasuzajem/gfnghhf/41352410841.pdf
    • https://tadesurirow.weebly.com/uploads/1/3/2/7/132711952/juwoleretoka.pdf
    • http://paguwob.22web.org/statistical_treatment_of_data_thesis_example.pdf
    • https://static.s123-cdn-static.com/uploads/4366400/normal_5fff944d73b1c.pdf
    • https://cdn.sqhk.co/rewazexi/ichgThd/5100212937.pdf
    • https://vexepediv.weebly.com/uploads/1/3/4/6/134668456/tiguvozabeguw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xanedemu.onlinewebshop.net/jupona.pdf
    • http://rexenejo.epizy.com/company_letterhead_format_word_file.pdf
    • http://pojepafadudigu.rf.gd/the_hidden_oracle_book_review.pdf
    • http://rasifufolugewep.epizy.com/zisebeguzoda.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0c2.bin
2c591cbb9c869f2a81f6b0ce3ffcc3d8c579017abc9bd4a5fc393a4f46229d92		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C2 5532 bytes
font_01_sfnt_off00010373.bin
3ab343c2e213b3adc175dd6b1e1d4dff0d5bcf393f49bb0c73b832df75cd8bc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10373 10628 bytes

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