Malicious PDF — malware analysis report

Static analysis result for SHA-256 556f369fe94476c4…

MALICIOUS

PDF

78.2 KB Created: 2021-02-15 06:49:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 7c0fc56ea129ef6e949fa73c7d6eeb40 SHA-1: 610368afd9a510291bb6fa3206f85ad47de0dd08 SHA-256: 556f369fe94476c46da45f484f2aac1e104f00880003b1613aa9e1a7614eb178
186 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
  • 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.
  • 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://jottigo.ru/wb?keyword=lombok%20annotations%20cheat%20sheet PDF link annotation
    • https://ralugegab.weebly.com/uploads/1/3/4/8/134888835/3436296.pdfIn PDF document text
    • https://kagivosivozavex.weebly.com/uploads/1/3/4/7/134746508/nojileze.pdfIn PDF document text
    • http://tk-time.site/vebufifuluxapitatadet6upl1.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/hbgBgcy/consulting_math_apps.pdfIn PDF document text
    • http://bitawulam.iblogger.org/nixibewevuleju.pdfIn PDF document text
    • http://gratoraama.space/764506534803zv7t.pdfIn PDF document text
    • http://lnstagram-copyright-supports.com/bsc_nursing_admission_form_rajasthantouyc.pdfIn PDF document text
    • http://antonioit.space/apple_cider_nutrition_informationx98wo.pdfIn PDF document text
    • https://cdn.sqhk.co/munakuvu/cjibgjd/teacher_assistant_grade_book_high_school.pdfIn PDF document text
    • http://mkr-olimp.info/15035559137vebj6.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/DUibKv8/lenekidikobubudaluwovemar.pdfIn PDF document text
    • https://mufamemibota.weebly.com/uploads/1/3/1/8/131856380/97daf6391ce91.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/cR5ijpV/banupogorukuxekuvega.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/ggiDwjg/75447504368.pdfIn PDF document text
    • https://cdn.sqhk.co/govazilose/jid5ckR/darakawanif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fizanotafogibag.rf.gd/60711540832.pdfIn PDF document text
    • http://sudebesiku.epizy.com/mugerugafaneninep.pdfIn PDF document text
    • http://soxixebupi.rf.gd/alight_motion_full_apk.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_off0000ec1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1F 5056 bytes
SHA-256: 985aa32bba9a10c4c7c6a8aceeb87494cf98a5d5e6f30bd9d3dbff2167d6903f
font_01_sfnt_off0000fd2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2D 14300 bytes
SHA-256: 409c36120c3dd56fb2a030baca9471ecb5fc73b4f1f86bba9bee99e670feb601