Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d05f5e6d30a00aa…

MALICIOUS

PDF

87.2 KB Created: 2021-03-17 19:31:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 613a4b1f456ee659a0a24517f2a52a3a SHA-1: 8b3b0353c88b4ba7e87afe816d52dab218a0d8c7 SHA-256: 1d05f5e6d30a00aafed137ea5fad73d234137d9af7ae2a64664f7bf3c45a4c1c
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-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://botokaw.ru/wix?keyword=east+haven+board+of+education+meeting+minutes PDF link annotation
    • http://tanitebose.22web.org/email_format_icse_2019.pdfIn PDF document text
    • http://pornbustyvids.com/vadapaxejekineropubdfuz.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuzajomugi/i1ijvii/highway_moto_rider_traffic_racer_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/purilusevike/cgdDrub/gun_sounds_effects.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/wisdom_of_solomon_5.pdfIn PDF document text
    • http://skout.tech/how_much_is_samsung_s9_price_in_nigeriazv3nl.pdfIn PDF document text
    • http://slmit.fun/394730764372u8ls.pdfIn PDF document text
    • http://tactical-jacket-sale.shop/33022259485rctjj.pdfIn PDF document text
    • http://pajelonagij.iblogger.org/rinnai_556f_red_light.pdfIn PDF document text
    • http://arendaavto.taxi/how_to_predict_bond_angles_and_shape2ezz0.pdfIn PDF document text
    • http://fitness1.space/armitron_45_7042_manualtqf0r.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/27343097956.pdfIn PDF document text
    • http://fashion-deals.xyz/wisumujumuviwonufiwasi0m0su.pdfIn PDF document text
    • http://lianhua.life/pagifylt82.pdfIn PDF document text
    • https://cdn.sqhk.co/mopewedote/hgdOidN/34057857422.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6cddc305-6a84-4228-a484-db1433c88bfa/how_to_figure_out_bond_order_from_lewis_structure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/613afdcd-0af4-40e8-8340-079ee6d3e3b2/49292030086.pdfIn PDF document text
    • http://fataragoreb.myartsonline.com/lokebulivod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d0d5f94-695f-47eb-a8db-6e4d810bc26b/vutavabumanibize.pdfIn PDF document text
    • http://tixelupaninaber.rf.gd/52237563483.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A98 5444 bytes
SHA-256: e0f5bcdd557c99992d4f6b459eda9f15e11d262d0e486e14c58e497a2cc97735
font_01_sfnt_off00011cec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CEC 10304 bytes
SHA-256: 6352d5a2c8e7599e5179708dc4ec343b2855bb3bdd9a8b0e74a201f0a01e0230
font_02_sfnt_off00013fb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FB0 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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