Malicious PDF — malware analysis report

Static analysis result for SHA-256 2daccec4c0d422e0…

MALICIOUS

PDF

78.5 KB Created: 2021-05-04 06:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 78cbc082634790fe09033696d72b217f SHA-1: 15713b89b1f85728db5e816c5a69f2b19f9bdeb3 SHA-256: 2daccec4c0d422e01cfe35d522f7c38b5868639b3b688ba0d23ef5f629fc8509
126 Risk Score

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 0.9990

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://gimoguvi.ru/strik?utm_term=it%2527s+the+end+of+the+world+as+we+know+it+chords+ukulele PDF link annotation
    • https://cdn.sqhk.co/baluwofuk/fhd2gji/pinball_fx_2_cracked_free_download_full_version.pdfIn PDF document text
    • https://cdn.sqhk.co/nurofiwele/QNiggf3/original_donkey_kong_game_characters.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456119/normal_6027de6cdc03a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450151/normal_5fda8d50dbe6a.pdfIn PDF document text
    • https://jujamepusa.weebly.com/uploads/1/3/2/8/132815903/b6694.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450256/normal_602aa4b304ff6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451927/normal_60026826c7ecf.pdfIn PDF document text
    • https://cdn.sqhk.co/piwuzuberaze/geDgclF/realistic_gun_shooting_simulator.pdfIn PDF document text
    • https://nekurunezofadi.weebly.com/uploads/1/3/4/8/134892804/6820861.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421627/normal_5fc69d1751887.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367640/normal_605be576d0b59.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451542/normal_5ff9916e4add2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486987/normal_605d75bf758de.pdfIn PDF document text
    • https://vobulesije.weebly.com/uploads/1/3/1/8/131857334/mitojanividonabi.pdfIn PDF document text
    • https://karaxofuko.weebly.com/uploads/1/3/5/3/135344752/zozakusifod_kipinas_girekuwupalebud.pdfIn PDF document text
    • https://cdn.sqhk.co/sogefuluf/bRzjeq7/60108354197.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5af738b-6ebb-4ba9-900d-81dea5a11bcd/historia_de_la_independencia_de_mexico_corta_para_nios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79c5a62e-9090-4157-933e-dbf3cfd738f2/diablo_3_switch_same_console_co_op.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fecddf0-4309-4424-9e2b-296d522120e0/61155195101.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/prestige_autoclave_2100_classic_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/603ed528-a371-48bb-a0ef-7b7082c054a3/2015_international_prostar_warn_engine_light.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/40326590549.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/breville_smart_oven_air_fryer_fish_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/tetanus_toxoid_dosage_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fdd9364-bc3e-4cbe-8f7b-aa0c362cecec/68135408218.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_off0000f2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A2 5236 bytes
SHA-256: cbc318b89e452c81aae77360b4d2763870f3d814f03245439ce54a4f14d20a78
font_01_sfnt_off00010484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10484 10944 bytes
SHA-256: 78db87ce6633d4e5c4feb5c12dd9eecd371e380e10db1ee50c2d955623a4a230