Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68cc0f5a16834ba…

MALICIOUS

PDF

183.3 KB Created: 2021-03-28 05:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5d1b698425fbe582e0d6625de80e630a SHA-1: 967180ce618e8bdd02b9e3a3a1059114c03dc5de SHA-256: b68cc0f5a16834bafd78516a0eebbfbbc9e636e00185633c27fecd31e8ad0190
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

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 0.9344

Heuristics 4

  • 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
  • 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/award?keyword=yasin+surah+arabic+in+pdf PDF link annotation
    • https://cdn.sqhk.co/gewanunu/dhfkQgg/bsc_agriculture_biotechnology_notes.pdfIn PDF document text
    • https://cdn.sqhk.co/jabisopomuxo/s4EicD5/ruwomenowotola.pdfIn PDF document text
    • https://cdn.sqhk.co/xasakeza/gpjbkjb/emoji_puzzle_level_49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486199/normal_601b351abb67b.pdfIn PDF document text
    • http://trysalon.xyz/kenmore_elite_refrigerator_model_795_owners_manualrdqm1.pdfIn PDF document text
    • https://cdn.sqhk.co/nogojexibawa/n75JHOx/ftl_stealth_cruiser_achievement_guide.pdfIn PDF document text
    • http://liko-sneakers.com/4186332007gfqvy.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/mopesemo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462992/normal_604e5a5f8a2ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464070/normal_6005c85fd0582.pdfIn PDF document text
    • http://xalapuzim.sportsontheweb.net/himno_del_maestro_panama.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_601bfcaa33995.pdfIn PDF document text
    • https://cdn.sqhk.co/pabilere/jDHghsw/how_to_go_viral_on_tiktok_2020.pdfIn PDF document text
    • http://braco.ru/64791259176phdzi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/istqb_advanced_test_manager_exam_questions_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/court_of_mist_and_fury_book_order.pdfIn PDF document text
    • http://pabotojixupi.atwebpages.com/creature_from_jekyll_island_free.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/P21_Chapel_Avenue_Jersey_City_NJ.pdfIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0002c8e5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2C8E5 9349 bytes
SHA-256: d32e8c86bb80bef70b51018964da832eeb3da4c30e70a95f7506a1e13154a66a
font_00_sfnt_off000288e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x288E7 1636 bytes
SHA-256: c1624c868292407e37b6a73d998ab4dc351f9d8fa6993644057eaa5eccacd4ff
font_01_sfnt_off00029126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29126 5312 bytes
SHA-256: fd58f121749f63f705b4e23b8ac53683d814b504be5cde655b6202348e504679
font_02_sfnt_off0002a329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A329 11044 bytes
SHA-256: ab27259fc0676d109dbe3398ae6b544b9fd8eb22715c7545375d49ef7ac0a723

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