Malicious PDF — malware analysis report

Static analysis result for SHA-256 1852cc47554c5c80…

MALICIOUS

PDF

71.3 KB Created: 2021-02-22 01:59:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8c253edb1e2dfb35b8b2ed82cb4b46a3 SHA-1: ef81d965f898ed3c29b63849a876ca21f8937b9f SHA-256: 1852cc47554c5c80eb4f2300556124619e2bbf6baf74c62c486a09ce53dc0353
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/wix?keyword=unblocked+games+riddle+school+transfer+2 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4492259/normal_5fe76d13566cf.pdfIn PDF document text
    • http://getizibibi.22web.org/kodiak_weather_report.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452593/normal_601b0209cc641.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477173/normal_600686d62c0a9.pdfIn PDF document text
    • http://trokot-online.xyz/calligraphy_fountain_pen_practice_shmkzqg.pdfIn PDF document text
    • http://trysalon.xyz/6876345797920y9h.pdfIn PDF document text
    • http://redit.fun/lawimupibab9v6f6.pdfIn PDF document text
    • http://tefuzomabi.iblogger.org/nobofogagati.pdfIn PDF document text
    • http://table-wait.com/zeguluxopuma1fr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448121/normal_601bcc86939b0.pdfIn PDF document text
    • http://jigitozunawada.66ghz.com/citroen_c3_aircross_manual_usuario.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://losikamadan.epizy.com/good_morning_photos_hd_2017_free.pdfIn PDF document text
    • http://vitijumixanuzit.epizy.com/mejamuka.pdfIn PDF document text
    • http://jidoreno.epizy.com/2005_6.0_powerstroke_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/kraftmaid_cabinetry_specification_guide.pdfIn PDF document text
    • http://gefuxexo.epizy.com/brightness_control_app_android.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_off0000d912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD912 5760 bytes
SHA-256: 1ac0ae0affe4b88cf22f8d331ae05ddb765c369ffe38ec52be20c32cf46ef878
font_01_sfnt_off0000ec88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC88 10408 bytes
SHA-256: 7bf76ed364b0b52174a6274edce8f0c061ebaf124739482c8378f8429a5c19ec