Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1a8e1f030a03ae4…

MALICIOUS

PDF

66.5 KB Created: 2021-02-14 01:42:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6d3edbe224aadf419d0370d87d939a9a SHA-1: 981375b8d3578742d65aef800108dde44539fecb SHA-256: d1a8e1f030a03ae48390e254e07833b6f289a3a7377c27a05db9fdf0bcf7dee8
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=content+area+reading+vacca+11th+edition+pdf+download PDF link annotation
    • https://tedejewudokas.weebly.com/uploads/1/3/1/0/131070167/babc0bb10574d7.pdfIn PDF document text
    • https://zigibopujomez.weebly.com/uploads/1/3/5/3/135350997/puzinimanup.pdfIn PDF document text
    • http://allerlo.xyz/4205384794lrdkn.pdfIn PDF document text
    • http://verifybadgehelp.com/english_grammar_multiple_choice_exercises6g0tt.pdfIn PDF document text
    • https://pusexijubod.weebly.com/uploads/1/3/5/2/135296384/1271616.pdfIn PDF document text
    • https://pusotovoxidelo.weebly.com/uploads/1/3/1/6/131637553/7365781.pdfIn PDF document text
    • https://gewilowada.weebly.com/uploads/1/3/0/7/130776716/96d308976b.pdfIn PDF document text
    • http://creditscorehelp.info/angaar_bengali_movie_mkvqlqwn.pdfIn PDF document text
    • https://silepokow.weebly.com/uploads/1/3/4/3/134366863/kizixepo_tepodinulute.pdfIn PDF document text
    • https://jukovuwivoxufab.weebly.com/uploads/1/3/3/9/133997180/volugi.pdfIn PDF document text
    • http://7lessons.site/all_psychology_theoriespeml6.pdfIn PDF document text
    • https://lexawuvake.weebly.com/uploads/1/3/4/6/134610488/vedakinekij.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/nafamaragisek/delolitewugegunud.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/webugu.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/64166181925.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/sublease_agreement_format_in_word.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/serinemofaduvutetopidosa.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/gowolitarurofaxusuxu.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_off0000c60a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC60A 5348 bytes
SHA-256: f5cb877a5549fc06cd414848d2a73ac5eb4ba1a6fe0324f97a39bb7933029f17
font_01_sfnt_off0000d852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD852 10768 bytes
SHA-256: c37fa8d6e5844c327c9920584225d753a99e847f1c3c8e8b6828bc630ac3d2bd