Malicious PDF — malware analysis report

Static analysis result for SHA-256 c31870aeca646f60…

MALICIOUS

PDF

71.5 KB Created: 2021-02-17 10:56:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 01f99c13c8123e837b0b001c196c186d SHA-1: 82c394db102f2eaeb6ba27c7505497b163cde74f SHA-256: c31870aeca646f600e95a10fe4e948603a8cfb8cf15507201bee89befeac0eac
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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=duralast+jump+starter+1200+not+charging In PDF document text
    • http://tiktokfrance.fun/xizodobigekudufidibguxk.pdfIn PDF document text
    • https://zeduwekikozive.weebly.com/uploads/1/3/6/0/136050246/dadelopatet.pdfIn PDF document text
    • https://mituwekema.weebly.com/uploads/1/3/2/7/132740464/5113229.pdfIn PDF document text
    • http://fito4ka.xyz/906515123517t9qy.pdfIn PDF document text
    • https://cdn.sqhk.co/lefidotoxono/jatZygj/flow_chart_free_download.pdfIn PDF document text
    • http://tevajevidiwa.22web.org/54120888103.pdfIn PDF document text
    • http://axacheat4.xyz/how_do_you_use_apple_cider_vinegar_for_your_faceycfns.pdfIn PDF document text
    • https://cdn.sqhk.co/bomumuxa/gcgfijb/d_d_5e_adamantine_weapon.pdfIn PDF document text
    • https://cdn.sqhk.co/taranumota/hbggIcd/41085671939.pdfIn PDF document text
    • http://kernig.pro/48980474420ntv7j.pdfIn PDF document text
    • https://tajupifode.weebly.com/uploads/1/3/1/0/131070450/9600158.pdfIn PDF document text
    • http://monoga.space/dinalolilowusupajixuxi6o15.pdfIn PDF document text
    • https://cdn.sqhk.co/wutalididow/8gghiVB/basketball_world_championship_2019_usa_roster.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://togipumenotu.epizy.com/54509823747.pdfIn PDF document text
    • http://vubixijugisoloz.epizy.com/jujadikisemupiwizumafefe.pdfIn PDF document text
    • http://vujiwexamofone.rf.gd/honeybuns_telford_ofsted_report.pdfIn PDF document text
    • http://denotepisijolib.rf.gd/tally_addons_free.pdfIn PDF document text
    • http://munoxefarofow.rf.gd/fisegakidulizifufifejutel.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_off0000d831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD831 5748 bytes
SHA-256: 4ba925830464aa304ffc8fcf4cd7d2be0532418f3bd0c9a28da41cd667f94660
font_01_sfnt_off0000ebab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAB 10912 bytes
SHA-256: 017b1702d8a636947da7e5a20a3f0728a9ac7b0d2adfb81315e14c3ac9d6e404