Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1c6295dc4a829a…

MALICIOUS

PDF

92.2 KB Created: 2021-05-01 08:54:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7fb057bc20ec4c384adc0c1c6620623f SHA-1: fc30ad97581d0d33e2c440992d117ace4f3f24ba SHA-256: ba1c6295dc4a829aa21abf221a22e087d0be0dc372b25c5a7d903f213d6cba35
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 0.9990

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://pelibifir.ru/strik?utm_term=odd+thomas+full+movie+online+in+hindi PDF link annotation
    • http://rollernefritmassage.xyz/zuwazanebapofazasudute5vlcy.pdfIn PDF document text
    • http://berkeciftci.net/712360523212h1c6.pdfIn PDF document text
    • http://useplafond.xyz/timoropisowotazobevudaparj4a8l.pdfIn PDF document text
    • http://glawerry.online/8369353472hadqx.pdfIn PDF document text
    • https://vadugoza.weebly.com/uploads/1/3/4/5/134599956/23f620b94a382.pdfIn PDF document text
    • http://meetly.space/how_to_use_left_and_right_brainzai1s.pdfIn PDF document text
    • http://latuha.com/58275806884c6ck1.pdfIn PDF document text
    • http://003-center.ru/lojajevel3jwf.pdfIn PDF document text
    • http://hopecommunitynaz.com/wonder_color_color_by_number_free_coloring_book56b91.pdfIn PDF document text
    • https://bexukisutiso.weebly.com/uploads/1/3/0/8/130873741/gigitapewuzemivukoma.pdfIn PDF document text
    • http://urro-hu.com/weber_genesis_e-330_grate_size7jl4b.pdfIn PDF document text
    • http://damvglaz2.xyz/circuit_analysis_and_design_ulaby_solutions2o6a2.pdfIn PDF document text
    • http://itdiscount.info/perrines_literature_12th_edition_pd2iij8.pdfIn PDF document text
    • http://gonzo-3d.com/vrealize_automation_7._2_installation_guide3je53.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/48dc5ee9-2e2e-44af-ac1d-5b6b8970a335/46844288918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c72191f4-5a22-4dca-bec1-af09db0ec3b6/waxan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ead97105-a22c-4a96-a806-83ecce363ff8/buzililobedawebezizofidip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7afb919-661c-455d-a6f3-816847106027/57967373197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe51d48e-566e-4180-9399-e613c103f63c/is_galaxy_s9_verizon_unlocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4254f494-30e4-4a8b-8b9b-5f1c45309697/what_do_dapples_on_a_horse_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1bed741-b217-40c7-bc0d-a235bc0a1b64/mososipojetaxewiruwomoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c865efd5-9d58-47ed-b5bc-e67e2d1795a7/88618691795.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca186f88-89eb-4bf4-ace4-e4b6fc68144e/lg_ac_ch_38_error_code.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_off00011f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F56 5020 bytes
SHA-256: ec1311b5a3048e8bb7d7925963201fa749f7594af5b333944347216fe4be09d0
font_01_sfnt_off00013052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13052 10732 bytes
SHA-256: 7035163e9b386705f0978a4603d741a6b93f43454f257549ce72f73acf0793d3
font_02_sfnt_off00015506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15506 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3