Malicious PDF — malware analysis report

Static analysis result for SHA-256 a35ff928a75e070a…

MALICIOUS

PDF

66.4 KB Created: 2021-02-13 13:42:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3c71964da32e640b46d1538900f1d574 SHA-1: cc7c5e38753666aab0728a3d4a6c1d57c48a79b4 SHA-256: a35ff928a75e070ac0ae729d8c02ec19dd32fb20dfce863a2d2c78590e91dce8
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/wix?keyword=bowling+green+r1+school+calendar In PDF document text
    • http://kpupnov.pro/electric_trains_sets_for_christmas_tree03b2r.pdfIn PDF document text
    • http://fefogumok.22web.org/fairy_tales_story_books_with_pictures.pdfIn PDF document text
    • http://makedctl.site/sisters_oregon_weather_cam8j10j.pdfIn PDF document text
    • http://wijufonexomi.22web.org/barcelona_map.pdfIn PDF document text
    • http://naturalm.space/moments_choose_your_story_mod_apk_1.1.5k2q02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374022/normal_5ff20b9bab308.pdfIn PDF document text
    • http://starconflict-game.ru/40748725424jdoiy.pdfIn PDF document text
    • http://fabimepela.22web.org/miwejimimagevimimamitux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471249/normal_600cafd6617d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417216/normal_5fee92d42a200.pdfIn PDF document text
    • http://zinusefubowewet.22web.org/36465995974.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rokusagotigenov.rf.gd/texararune.pdfIn PDF document text
    • http://fizifar.epizy.com/41218009956.pdfIn PDF document text
    • http://kopixagelaje.rf.gd/the_battleground_movie_pubg.pdfIn PDF document text
    • http://mugekalamiwatek.epizy.com/78537932037.pdfIn PDF document text
    • http://mikovugeg.epizy.com/1540362141.pdfIn PDF document text
    • http://lubudag.epizy.com/vehicle_number_tracker_app.pdfIn PDF document text
    • http://fesemuk.rf.gd/diablo_2_lord_of_destruction_guide.pdfIn PDF document text
    • http://sewasijibakel.epizy.com/73903487497.pdfIn PDF document text
    • http://sarososibi.rf.gd/free_casino_games_slot_machines_no.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_off0000c7ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BA 5396 bytes
SHA-256: bfb548e0818322117f3506289546362b9bd436e2ecbe40fdac0013d4732540ae
font_01_sfnt_off0000da28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA28 10072 bytes
SHA-256: 44ef07e7b1c1af01da6cade4e49f637115e3ec220cc31351a38f01aa10bd071c