Malicious PDF — malware analysis report

Static analysis result for SHA-256 84300dc0253d01f8…

MALICIOUS

PDF

74.2 KB Created: 2021-03-05 22:32:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a230b4d2b906db1c340fa70334dd0cf7 SHA-1: 829a8e796a124979155cb9e7453b01cf7a941fbb SHA-256: 84300dc0253d01f88c608d6806b60a3fb9c060b8df7c086ee83bfa760f080c9b
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment 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 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=1997+kawasaki+mule+550+owners+manual PDF link annotation
    • https://cdn.sqhk.co/dilobowuz/lhjQDhf/kilamesuluvibe.pdfIn PDF document text
    • https://cdn.sqhk.co/xosifusozat/ChaEih4/cash_app_card_withdrawal_limit.pdfIn PDF document text
    • https://cdn.sqhk.co/novupezezis/eigNHif/bet_shows_2000s.pdfIn PDF document text
    • http://mixit.info/kavewu0cbhb.pdfIn PDF document text
    • https://wawodedirikib.weebly.com/uploads/1/3/5/3/135348651/4799325.pdfIn PDF document text
    • https://ranenowubugipo.weebly.com/uploads/1/3/4/0/134040983/gokifobowalibedekena.pdfIn PDF document text
    • https://nagiliju.weebly.com/uploads/1/3/1/4/131412426/4ed3d2139f.pdfIn PDF document text
    • http://toppiksnack.xyz/why_wont_my_galaxy_s5_turn_onoj619.pdfIn PDF document text
    • https://cdn.sqhk.co/wisewuguv/7Chijhd/befusuwamuvinibigebegipun.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/gcujhgd/subway_simulator_3d_mod_apk_2._20._02.pdfIn PDF document text
    • https://parafobosa.weebly.com/uploads/1/3/1/8/131857791/d2d4c8f56b66c4.pdfIn PDF document text
    • https://cdn.sqhk.co/tokafumotebi/bDhhfjb/72407507989.pdfIn PDF document text
    • https://cdn.sqhk.co/miburixegapu/eIjhxdS/91100798992.pdfIn PDF document text
    • http://load-bcp.com/m2n68-la_motherboard_driversge7c3.pdfIn PDF document text
    • https://cdn.sqhk.co/jonuwezipagi/hahehiR/tejubunigajoganirelul.pdfIn PDF document text
    • https://cdn.sqhk.co/rosavuzezig/xha19gi/begaf.pdfIn PDF document text
    • https://cdn.sqhk.co/jojikoxazew/edJTBpS/build_block_craft_uptodown.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://05790d5e-93e9-4545-bcc4-99c37f081c18.filesusr.com/ugd/bff4d5_10661da7dce9419caf483a8eb37482e0.pdf?index=trueIn PDF document text
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_deff720da47840af924f2867374b8e77.pdf?index=trueIn PDF document text
    • https://6e37e838-c278-4d46-baa9-25b8497af200.filesusr.com/ugd/fbcb80_fcd9372d1a8f41428242fb78b029859a.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_off0000dfb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB3 5444 bytes
SHA-256: a66ed4e2a788086e1aa22a438eadada23a695a6f4140586e0e5ec5e25f789820
font_01_sfnt_off0000f24a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24A 12736 bytes
SHA-256: 6909dc3173996e8a2b5fa916684cafaecbd6adbe922631626ec088cdf1a1a617

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