Malicious PDF — malware analysis report

Static analysis result for SHA-256 6100601ed09c99b9…

MALICIOUS

PDF

80.1 KB Created: 2021-05-09 04:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8255e5dc397df7f88f4c1fc578d048e SHA-1: 14ecd76bd00dc6c4973b04d9271a7cf80637a99e SHA-256: 6100601ed09c99b9928dc7b2c1086a36bfa1751be5c14b4cfbe3ce102e7edac2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a heuristic firing for an external URI pointing to a suspicious domain, and the ML classifier strongly indicates maliciousness. The document body, though partially corrupted, suggests a lure related to water softeners. The ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=are+saltless+water+softeners+effective
    • http://kopaburak.sportsontheweb.net/sports_equipment_list_for_schools.pdf
    • https://cdn.sqhk.co/giganopof/jaAijha/69447750575.pdf
    • http://xafawotilujos.mypressonline.com/boxinazijelikimu.pdf
    • https://cdn.sqhk.co/kulizuxekume/phi0bSm/6734309857.pdf
    • https://cdn.sqhk.co/rozesivotix/ieZ1bEE/fifa_7v7_soccer_field_dimensions.pdf
    • http://sibatike.getenjoyment.net/54756268145.pdf
    • http://callup.today/bruce_buffer_it_s_time_gif_with_soundqbkgd.pdf
    • http://kixiwogazu.sportsontheweb.net/bd_government_calendar_2020.pdf
    • http://wigageturuv.mywebcommunity.org/wimsatt_beardsley_intentional_fallacy.pdf
    • http://nukels.xyz/aoa_full_form_in_college0cux6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/2087ac63-fdd4-4209-83be-85f55f062502/james_baldwin_important_facts.pdf
    • http://mezuvisudaduvo.epizy.com/66968268731.pdf
    • https://uploads.strikinglycdn.com/files/948c70ea-783f-4210-9ac0-043a4c6567db/how_do_i_log_into_my_icloud_account.pdf
    • http://lagadasisipas.rf.gd/22409707568.pdf
    • https://uploads.strikinglycdn.com/files/5a7d1e07-5c82-4389-aaa4-fa269c80e70a/how_to_deal_with_being_sad_for_no_reason.pdf
    • https://uploads.strikinglycdn.com/files/65a60834-527a-4ad9-832d-30ad62b06e9f/un_mundo_feliz_serie_imdb.pdf
    • https://uploads.strikinglycdn.com/files/8ed598cc-dd96-4c59-baff-c8c0693be600/what_are_relationship_core_values.pdf
    • https://uploads.strikinglycdn.com/files/12e4ac23-910e-4d62-a694-b0e098fcddc6/97640435367.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eecf.bin
b8e0c9a9b4a95f3cf41c1cea1e82f0d391c37778da923eaeacd76fe19113c6af
pdf-font-stream PDF embedded font (sfnt) at offset 0xEECF 4804 bytes
font_01_sfnt_off0000ff3c.bin
4c10fba3d943f905ad5005d6cf812ed4b2307246aa66fcf87009299a6aa56a0d
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3C 11536 bytes
font_02_sfnt_off0001251c.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1251C 4324 bytes