Malicious PDF — malware analysis report

Static analysis result for SHA-256 b02408705b703423…

MALICIOUS

PDF

77.4 KB Created: 2021-04-27 07:08:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ade03f45efa3ddadc313ec7296ad16c1 SHA-1: 1220b60220e53e32e66774c05cd57f8c8a693a03 SHA-256: b02408705b7034231c9c06ddec27b30a42af920f1e4a0b2ce8f3d7890fb2bfc0
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://leonvi.ru/strik?utm_term=american+gods+season+2+episode+1+recap PDF link annotation
    • http://bluebadgeapproval.com/53699822368ddjb0.pdfIn PDF document text
    • http://xemizawufogutuf.scienceontheweb.net/dosisenes.pdfIn PDF document text
    • http://jomikifu.medianewsonline.com/ssc_gd._nic._in_answer_key_2020.pdfIn PDF document text
    • http://levantemosaic.com/jabumamojutujafezu8ax.pdfIn PDF document text
    • http://dadivasim.sportsontheweb.net/apprendre_le_portugais_brsilien.pdfIn PDF document text
    • http://woronari.getenjoyment.net/libro_cantares_mexicanos.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/mizeteb/best_ccna_200-301_book.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/how_to_fix_clicking_graco_swing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aba32fd4-f82d-4a13-aa60-5787dd403579/85879425256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9255e8be-a712-4c2d-89a9-046d8e021972/loxagifuzigexenugenexa.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/ginil.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/facial_gel_sheet_mask.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cc72930-68a4-43c9-a13a-6e4a2d06db5c/merudevo.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/tuvosirebeludetukajumuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4d50e42-3905-407f-9018-d6390425d99e/bamijuke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9d0c7c6-5761-4aa8-b077-7c82e1a2c230/zasuzimoruzagejunimeterif.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/what_happened_to_pablos_wife_after_his_death.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37c46aa6-cb06-4a47-9b20-692a3fcdf407/20976339683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8862a1d8-ee74-4fc4-ac22-01f138153a0b/hoover_dual_power_max_pet_fh51001_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/chammak_challo_jara_dheere_chalo_gana.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_off0000f1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E7 5536 bytes
SHA-256: ac4497d8a9c5aa001c9841c39f9e4f27c237345db797b216555545c404c4ddfe
font_01_sfnt_off000104a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A9 10484 bytes
SHA-256: 76cb70094579fd6f0f43b0ac5cf409b984a1b7297e9a7f688a4bbde9418a469d

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