Malicious PDF — malware analysis report

Static analysis result for SHA-256 597c033f272e0ced…

MALICIOUS

PDF

68.0 KB Created: 2021-02-17 23:48:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6fdc059a508d3e7ef46efafcdff40dda SHA-1: 979764db1474977514242f17c76680c2683314cd SHA-256: 597c033f272e0ced566b8d982218132d381860bb77c714d3f6839a098d6e9ec2
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=echo+show+8+manual+pdf PDF link annotation
    • http://xujukega.66ghz.com/network_adapter_driver_windows_10_hp.pdfIn PDF document text
    • http://nibelv.xyz/cross_stitch_fabric_sizesuwu30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448991/normal_60210fe724853.pdfIn PDF document text
    • https://biwomewiwuxe.weebly.com/uploads/1/3/4/1/134131409/tibekusuwevisigoxul.pdfIn PDF document text
    • https://cdn.sqhk.co/dikizumi/hhjQgjf/reading_comprehension_strategies_worksheets_3rd_grade.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472186/normal_5ff78b46abc1f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xilutetixu.epizy.com/auto_chess_legends_apk.pdfIn PDF document text
    • http://vajonaz.epizy.com/chloroform_dna_extraction_role.pdfIn PDF document text
    • http://favuzokusom.rf.gd/2362163782.pdfIn PDF document text
    • http://rufupiz.rf.gd/sound_booster_free.pdfIn PDF document text
    • http://dixasimoxipux.rf.gd/adobe_premiere_video_intro_templates.pdfIn PDF document text
    • http://begosene.epizy.com/hopes_and_dreams_trombone_sheet_music.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_off0000cd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD50 5540 bytes
SHA-256: 853f85cd4f389793343089a5534ada10278bac06173fbc76a2b35d1595f2d8b2
font_01_sfnt_off0000e022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE022 10356 bytes
SHA-256: 3e58851a5f3f7ba7b09e5cbe11030f404e59d639110338c68b0be3ebc9d148a4