Malicious PDF — malware analysis report

Static analysis result for SHA-256 a279fe3f33601fc0…

MALICIOUS

PDF

80.2 KB Created: 2021-03-30 01:14:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a2a2d738a0fcf8b06888c0cd59787844 SHA-1: 142dc5e403fc7cd253bcee33c26a178b27ad40b3 SHA-256: a279fe3f33601fc0919d3daddb9bd0caa10ab451839c50e378f33508794e3a74
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-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://dugedepap.ru/wix?keyword=getrag+238+6+speed+manual+transmission PDF link annotation
    • http://wedurorokim.mypressonline.com/23751255437.pdfIn PDF document text
    • http://lotukaguw.sportsontheweb.net/9046220048.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/iRzhjZr/belkin_clear_screen_protector.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461204/normal_604366454ada0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463005/normal_5fd0efcfbca46.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/3691188414.pdfIn PDF document text
    • http://vevufilusik.scienceontheweb.net/ulta_beauty_application.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407795/normal_6007e0310f57d.pdfIn PDF document text
    • http://zuwifipenabed.medianewsonline.com/duvenurijufet.pdfIn PDF document text
    • https://cdn.sqhk.co/ladesajisama/BEgeUij/porterville_sheltered_workshop_thrift_store.pdfIn PDF document text
    • https://cdn.sqhk.co/getabemuto/hhjNicq/ludo_star_2017_update_version.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406482/normal_5fdacf84a390c.pdfIn PDF document text
    • http://slmit.fun/robot_framework_android_automationo9bk4.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/81521271555.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/wgdgeT5/79852549993.pdfIn PDF document text
    • https://cdn.sqhk.co/dofubetu/ajjyjaG/mega_millions_payout_calculator.pdfIn PDF document text
    • http://stassikorskyi.com/the_tangible_kingdom_reviewsuaz0i.pdfIn PDF document text
    • http://help-bluebadgecenter.com/busy_teacher_present_simple_worksheetsmh2yi.pdfIn PDF document text
    • http://streamsweets.com/jewosivegamoxedizebl0xl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_798983e82e1b40bfbdf6c83d7ff19276.pdf?index=trueIn PDF document text
    • https://4e4301d6-cc9a-4939-960a-6b497c1efea6.filesusr.com/ugd/d78803_0b513b52baf64c8f8de933d1da6e55f2.pdf?index=trueIn PDF document text
    • https://9ec55029-67b1-4fe0-9a5d-40fd638ac594.filesusr.com/ugd/dc5a51_05ce6396701341f18797c8f4e68ef3f1.pdf?index=trueIn PDF document text
    • http://tonavisuma.onlinewebshop.net/clases_sociales_de_la_edad_media.pdfIn PDF document text
    • https://b5d51143-f34a-4a4f-9265-6917490cb775.filesusr.com/ugd/9f69bd_f2c2adc84ab04df2a44c8493e52f870f.pdf?index=trueIn 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_off0000f954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF954 5956 bytes
SHA-256: 6aabd74b81f5c0016f19a1d300a47aa3518c2d5622b0cd8be84f78ce5a879cf6
font_01_sfnt_off00010d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7E 11036 bytes
SHA-256: 48352446c8b68ba7c95a0360fc01af344601b1912f7a8edca2bb5fbaf72404f2

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