Malicious PDF — malware analysis report

Static analysis result for SHA-256 437aee6479367880…

MALICIOUS

PDF

74.8 KB Created: 2021-02-08 02:46:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 17c6c64f6994f0d2c84bce313b2fbee1 SHA-1: ddf5b4521b49fb26944ea577478a5e3307e4c979 SHA-256: 437aee647936788031fd6bdc2e2d333e3a73b0de32bf7810c9d38191bcb8907b
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://yafferge.ru/wb?keyword=afektif%20bipolar%20adalah%20pdf In PDF document text
    • https://zekenegelu.weebly.com/uploads/1/3/4/3/134390475/7488798.pdfIn PDF document text
    • https://xatoxelal.weebly.com/uploads/1/3/1/4/131482937/4920739.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/jihcxnx/ice_quest_scholarship_2018.pdfIn PDF document text
    • http://masovizifuzaro.iblogger.org/wazeneronojijifesakiv.pdfIn PDF document text
    • http://toxedajenoxin.66ghz.com/70249757692.pdfIn PDF document text
    • https://wepuporo.weebly.com/uploads/1/3/2/7/132741302/3566616.pdfIn PDF document text
    • https://nefabilaj.weebly.com/uploads/1/3/1/4/131438225/velosokikeluruwiga.pdfIn PDF document text
    • https://cdn.sqhk.co/bipadifudame/hV6hehe/unity_3d_game_maker_app.pdfIn PDF document text
    • http://pigexavenume.iblogger.org/homophone_worksheets_3rd_grade.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duposul.epizy.com/talobutipakodag.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/bosch_electronic_aquastop_dishwasher_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/good_morning_hd_wallpaper.pdfIn PDF document text
    • http://xoxepilazif.rf.gd/37188844652.pdfIn PDF document text
    • http://pibekolovaxizon.epizy.com/bigetadidimowitewevesawuf.pdfIn PDF document text
    • http://ragigixo.epizy.com/full_display_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/78330873354.pdfIn PDF document text
    • http://zanavaf.epizy.com/xavejexupesig.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/93426435584.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_off0000e97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97D 5144 bytes
SHA-256: 080304983b5a67813659b01e1ef383d418fc01524e0e5bf42e4c748527fcf1f6
font_01_sfnt_off0000faf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF0 10368 bytes
SHA-256: 9492034567695ef7fee66559f5da1a67a99039889fbacec98350ecae62a450c0