Malicious PDF — malware analysis report

Static analysis result for SHA-256 b137b8de0dbf00e5…

MALICIOUS

PDF

72.4 KB Created: 2021-03-04 13:55:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5c34393df6f18f3d3cda7177705c3b19 SHA-1: 3aa0c8852f1637a4d4ecb2853e00ab4fe87fce2b SHA-256: b137b8de0dbf00e5cac9faf43208277217c07273e4093f9f8c5d201071a165fb
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, with a heuristic identifying it as a link farm on disposable hosting. One prominent URL, 'https://fokemale.ru/award?keyword=the+last+olympian+the+graphic+novel+%2528percy+jackson+book+5%2529', suggests a lure related to popular media. The PDF structure and embedded content are consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/award?keyword=the+last+olympian+the+graphic+novel+%2528percy+jackson+book+5%2529 PDF link annotation
    • http://pumorux.medianewsonline.com/74962207264.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465690/normal_5fe5fe7964053.pdfIn PDF document text
    • https://cdn.sqhk.co/derebeduno/hgcJZje/vusafavonoxijifixozu.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/by_the_river_piedra_i_sat_down_and_wept_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/litalile/bgdxgib/zoposuporudukefutuda.pdfIn PDF document text
    • https://cdn.sqhk.co/zipedufipiz/d49Dihf/boss_fighter_hero.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/jBGgjjg/hd_background_photos_full_hd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412154/normal_601e82ac070ca.pdfIn PDF document text
    • http://sufulilutidake.mypressonline.com/34728823441.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/Jibhi1K/kwai_video_downloader_without_watermark_apk.pdfIn PDF document text
    • http://tajuliwelofiti.medianewsonline.com/epson_wf_2530_wifi_setup_software.pdfIn PDF document text
    • https://cdn.sqhk.co/geroterunetu/eEjdhdn/17073827104.pdfIn PDF document text
    • http://lejunuzegakikuv.mypressonline.com/how_to_program_a_chamberlain_universal_remote_control.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tobidogajetu.onlinewebshop.net/27316478852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f9dde4f-9a7b-4ac1-962a-fa99d4545c03/the_snows_of_kilimanjaro_summary_wikipedia.pdfIn PDF document text
    • http://zevesijuduma.atwebpages.com/high_school_courses_needed_to_become_a_real_estate_agent.pdfIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/sefizaxifow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acb29bcc-23e5-4de1-907a-c3b77b3ef5d6/gujale.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_off0000db33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB33 6016 bytes
SHA-256: 521332b7d201e4f5eb5588259084409f200cdd870569d84f0a7c792868796e40
font_01_sfnt_off0000efad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAD 10644 bytes
SHA-256: 4ca00e63062c144f3c80a41d0637392fda92368ab7afb898b9bab2cfbf51fb06

Open this report in the interactive analyzer, or submit your own file for analysis.