Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ef1879c00d0bbef…

MALICIOUS

PDF

66.8 KB Created: 2021-01-31 10:14:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 3ed80ba93d945d2e6707d82fe6aa6ae5 SHA-1: e60fffd1a9c82edf9ba789dad096ba89d5a44dfe SHA-256: 0ef1879c00d0bbefc41b85936686d02f12c75cba870b064097dc7fb66aac7c66
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/wb?keyword=hearts%20of%20palm%20recipes%20cooked In PDF document text
    • https://cdn.sqhk.co/razulati/V1bhghh/electric_bass_guitar_for_sale_near_me.pdfIn PDF document text
    • https://jinijazi.weebly.com/uploads/1/3/4/6/134668286/gagowuluzumurini.pdfIn PDF document text
    • http://kesawalaxok.iblogger.org/flakiness_index_test_lab_report_discussion.pdfIn PDF document text
    • https://cdn.sqhk.co/zunesunatiri/cc85Jhb/iowa_storm_damage_map.pdfIn PDF document text
    • https://cdn.sqhk.co/kipaselofuza/gK3Ihbb/last_island_of_survival_new_map_update.pdfIn PDF document text
    • http://vienvozvrat.site/togilotitudu81s06.pdfIn PDF document text
    • https://cdn.sqhk.co/tokafumotebi/GhhplhF/17097329158.pdfIn PDF document text
    • https://neseroto.weebly.com/uploads/1/3/5/3/135326238/2996168.pdfIn PDF document text
    • https://cdn.sqhk.co/rafumufo/XhgAThh/kuzekijumigixi.pdfIn PDF document text
    • https://jezinuva.weebly.com/uploads/1/3/4/8/134869759/3dac6e0533f.pdfIn PDF document text
    • https://pupowoxixibigi.weebly.com/uploads/1/3/1/4/131438439/2229534.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/d4ggjmK/ewallet._apk_free_download.pdfIn PDF document text
    • http://puzofogerexiwi.22web.org/33228095599.pdfIn PDF document text
    • https://wafedegexusib.weebly.com/uploads/1/3/0/9/130969596/4361751.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/ctvndRP/wyze_smart_plug_vacation_mode.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/dhgJvVo/mazegem.pdfIn PDF document text
    • https://cdn.sqhk.co/purorelaz/fkgcNuK/crayon_shin_chan_runner_hack_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fukasutatota.rf.gd/vmware_workstation_version_12.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_off0000c7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BB 5328 bytes
SHA-256: 2637efce80eac1482e4bc207f3e5b16b58af5d7f4e72391ba51132670e96e02c
font_01_sfnt_off0000d9c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C1 10804 bytes
SHA-256: 3f55ba33fb124b1eca6ed513e2a408f7fbe561c6cb7c5239de321964e515b1c1

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