Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c4f47c7e6f60af…

MALICIOUS

PDF

70.3 KB Created: 2021-01-22 05:56:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c1d533b2a3f1ebd3e71be8a9e8130b48 SHA-1: 78547cf92051fb3449b15e4b8b3f716ae6b02b1e SHA-256: d3c4f47c7e6f60af8366f05655cd559bdec74ac68258600a065e97445b8ece14
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=bmw+key+battery+replacement+e90 In PDF document text
    • https://cdn.sqhk.co/kalijada/RJCgG0p/rotakibisevotazexibopu.pdfIn PDF document text
    • https://sijetuso.weebly.com/uploads/1/3/4/4/134499475/5137e.pdfIn PDF document text
    • https://site-1177846.mozfiles.com/files/1177846/screen_timeout_settings_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/idhcbXM/vazoxeti.pdfIn PDF document text
    • https://cdn.sqhk.co/vemudumuxixu/fhb0GJB/62879690087.pdfIn PDF document text
    • https://cdn.sqhk.co/gipudeviwapi/h6Bij5T/zombieland_2_double_tap_road_trip_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxifopu/jdpqjge/wajozavaga.pdfIn PDF document text
    • https://pefibiwurabamiz.weebly.com/uploads/1/3/0/8/130874510/de12541eb1d3263.pdfIn PDF document text
    • https://risonozolediwar.weebly.com/uploads/1/3/1/3/131398017/filajox.pdfIn PDF document text
    • https://cdn.sqhk.co/kepilujofeje/jbrIasD/movies_near_me_cinemark_12.pdfIn PDF document text
    • https://dapalirodo.weebly.com/uploads/1/3/1/4/131483520/3a3bedb.pdfIn PDF document text
    • https://xiwupezarevapo.weebly.com/uploads/1/3/2/6/132681984/ce09864a56.pdfIn PDF document text
    • https://site-1175317.mozfiles.com/files/1175317/sound_meter_banana.pdfIn PDF document text
    • https://cdn.sqhk.co/bixelosa/5utiiE1/drifting_games_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/nukunudakiju/jfNKheV/last_arrows_mod_apk_1._4._00.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD688 5648 bytes
SHA-256: 3054eb10c6c307e5dd4effd2d3acba0ae3a48209466d3c33f67a4d2cbb6ed6f4
font_01_sfnt_off0000e9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BD 10248 bytes
SHA-256: c2e3b273e5eca8d51aeb7179076e99b2704ebb9ebd9293fe0b523bc2157089ac

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