Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a86d9048c09948…

MALICIOUS

PDF

79.9 KB Created: 2021-03-15 00:42:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fedda5e3f4f8c7449344942c03135ce6 SHA-1: 5d801f6d95a2b6e4195db9756142a297b1aa31f3 SHA-256: 34a86d9048c099480075876478e126e7ebfe7d9925ada5409139cd9c88e4b6d0
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 0.9991

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://bologen.ru/strik?utm_term=how+to+reset+radio+code+on+2001+honda+odyssey PDF link annotation
    • http://zigapajuxijado.mywebcommunity.org/texto_instructivo_estructura_para_nios.pdfIn PDF document text
    • https://cdn.sqhk.co/dirotiweze/aMNkiaP/8613989076.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/6n1mHhb/xefupid.pdfIn PDF document text
    • http://gosunenibunale.getenjoyment.net/new_functional_training_for_sports_2nd_edition_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/famazipow/9jdicjc/target_archery_equipment_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/itMcX58/polufupotut.pdfIn PDF document text
    • https://cdn.sqhk.co/sibamoxa/eZETyw3/tableau_sort_stacked_bar_chart_by_total.pdfIn PDF document text
    • https://cdn.sqhk.co/purorenutuw/gfjy5Zx/12260804128.pdfIn PDF document text
    • https://cdn.sqhk.co/fatepotax/hrgeRaQ/wire_soap_cutter.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoladipezu/etjdqhg/lelidurexijobefulazogeli.pdfIn PDF document text
    • https://cdn.sqhk.co/riroxale/bihihak/cobb_10_theater_winter_haven.pdfIn PDF document text
    • http://kujunat.medianewsonline.com/how_to_turn_off_demo_mode_kenwood.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/dKhbZ4I/sonic_adventure_dx_metal_sonic.pdfIn PDF document text
    • http://gekiwejal.scienceontheweb.net/18902144307.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/93853045965.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/setigafat/8711865555.pdfIn PDF document text
    • http://lesidiwajenowil.myartsonline.com/dufakol.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/7456567341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8d695d6-eac4-4cc5-b085-18d7789d1198/night_shift_work_part_time.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/5621829121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e61ac36-f6e9-4d26-9d77-4e8c9584ec1c/16675553588.pdfIn PDF document text
    • http://witesenigo.atwebpages.com/dovusobu.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/free_printable_hindi_grammar_worksheets_for_class_2.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/numigolimaduti.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_off0000f882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF882 5476 bytes
SHA-256: b32a2104bb11672cca366e6b3b91e049b5eff2463c4efd4d9f1aa68aa7213d97
font_01_sfnt_off00010b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B33 11440 bytes
SHA-256: e0aac35e6cbc5e9329db1b3afb6335f0a8d23ee64111394e9d6a5280e636e1a0