Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bef3a7d7bff6cce…

MALICIOUS

PDF

73.2 KB Created: 2021-03-02 23:58:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 7e5359c5d8dbc839be79ae648b9e5d02 SHA-1: d56bfcdec5e346589e0246b555eb85701c7f2003 SHA-256: 0bef3a7d7bff6ccea6fc03403f86186190acf63438571bfc66474a9387810851
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://resalured.ru/award?keyword=oracle+pl+sql+string+concatenation+performance PDF link annotation
    • https://cdn.sqhk.co/kukojuvata/jehgjfb/head_basketball_unblocked_arcade.pdfIn PDF document text
    • http://sajitalunaded.22web.org/annual_general_meeting_invitation_template.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/ihUihoW/poxodoperaxubuw.pdfIn PDF document text
    • https://cdn.sqhk.co/pusuvizodez/qK8iXjb/63542281051.pdfIn PDF document text
    • http://load-bcp.com/hockey_night_in_canada_apple_tvf0frd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382621/normal_5fd62977d81f6.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/22952052468.pdfIn PDF document text
    • http://securityofusersdevicesonline.site/how_do_i_fix_the_oiler_on_my_husqvarna_chainsaw4z7bf.pdfIn PDF document text
    • https://cdn.sqhk.co/vonixilavot/3ifshdA/88752138022.pdfIn PDF document text
    • https://cdn.sqhk.co/gidulikegel/zP2gdjd/vintage_police_sirens_for_sale.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kuxegu/fuzatopudazusufifukizo.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/calculate_aspect_ratio_of_image_android.pdfIn PDF document text
    • http://jajowisomipuw.epizy.com/behringer_ecm8000_calibration_file.pdfIn PDF document text
    • http://xumugipetoje.epizy.com/cartoon_photo_app.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_off0000e1d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D1 5488 bytes
SHA-256: 0191a498649e91f64d29127ceecdc38e6221ba510d6b382c1e0ed0acaf46f64a
font_01_sfnt_off0000f464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF464 10388 bytes
SHA-256: 44db4d50754f3f1232aa35a2affe1c225e194e57b8eb42fcb6efc9937e758484