Malicious PDF — malware analysis report

Static analysis result for SHA-256 68c3f09006aa70aa…

MALICIOUS

PDF

62.7 KB Created: 2021-02-22 03:21:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 244255a3cf057a2d75464944f6dd00d0 SHA-1: c8fa26a52e1723ef1347166b36061e549b60db70 SHA-256: 68c3f09006aa70aafee32db1f8299a208361319413558c638d10ebb985c43f6c
236 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://maypoin.ru/wix?keyword=bissell+little+green+proheat+owners+manual PDF link annotation
    • http://faguduni.22web.org/fasibituxinupa.pdfIn PDF document text
    • http://nusamovepi.22web.org/cursive_template_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465543/normal_602c3140f0658.pdfIn PDF document text
    • http://enots.space/shakalaka_baby_songhtvds.pdfIn macro / runtime command snippet
    • https://gasaromub.weebly.com/uploads/1/3/0/7/130776100/pedewelujanerukumu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387419/normal_60023fe111b56.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jusuberu/air_force_2016_question_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/65262909987.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/tujowug.pdfIn PDF document text
    • http://kefixofelapadi.epizy.com/resumen_sobre_la_obra_el_principe_de_maquiavelo.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/correct_bicep_curl_form.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/ratibefawotafejinuzo.pdfIn macro / runtime command snippet
    • https://s3.amazonaws.com/polexebuj/beyblade_burst_apk_gameplay.pdfIn macro / runtime command snippet
    • http://vajekalisafemun.rf.gd/besurudowuterivokig.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/2008_mercedes_c300_manual_0-_60.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_off0000b9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9DA 5372 bytes
SHA-256: 382a5c284b5e139cbb596eb65a8f2c4a506ecad4486ec90aaf971dabb2477f9d
font_01_sfnt_off0000cc0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC0C 9900 bytes
SHA-256: 831cb7637b1be631fc61bc4db99edd0a8012ae104a5d515f4a24fba94715375c