Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30a38c20a4bf2bc…

MALICIOUS

PDF

76.3 KB Created: 2021-03-01 17:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d59fdb82d33848dd384cdc56b9c1fa6d SHA-1: a16c49e82f2e976f607d6f50ef2015002182c04a SHA-256: d30a38c20a4bf2bcd9865430e52f1ceca3734a746ae2fc75969bbf3bf459e6f9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains and identified as part of a link farm, suggesting a phishing or malware distribution scheme. The presence of external URIs and the overall structure strongly suggest the document is designed to redirect users to potentially harmful websites.

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
  • 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://resalured.ru/award?keyword=procare+humidifier+filter+walmart PDF link annotation
    • http://chempion.coffee/bob_vaughn_zodiacw9byd.pdfIn PDF document text
    • http://kinoogf.space/794695725879k0wp.pdfIn PDF document text
    • http://santand-es.com/marionettes_inc_discussion_questions23ww0.pdfIn PDF document text
    • http://de-bewertung-889562.icu/bidovinoroxapezifowakog4qmx.pdfIn PDF document text
    • https://cdn.sqhk.co/tepikipo/q2jfjhi/42694013901.pdfIn PDF document text
    • https://cdn.sqhk.co/wanadujogo/fiigegf/fokusokivukezofovul.pdfIn PDF document text
    • http://sarkife.site/sutosidogilurcpxap.pdfIn PDF document text
    • http://bonus332.site/893849240200su9q.pdfIn PDF document text
    • http://streichpack.online/amuleto_roberto_bolaoqf62d.pdfIn PDF document text
    • https://cdn.sqhk.co/fugolamudara/U4wigkz/20106060126.pdfIn PDF document text
    • http://energierecrute-emplois.com/37024501072uyyya.pdfIn PDF document text
    • http://0fruits.space/al_quran_translationqfztb.pdfIn PDF document text
    • http://seamanygau.best/maduracion_placentaria_por_ecografiaui3ha.pdfIn PDF document text
    • http://cardioactiveitalia.site/interview_questions_for_math_teachersvwco4.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/woberiz/merosuwukanagexizikux.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/tiwunibewenifajopanup.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/shadowrun_genesis_matrix.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_off0000ec2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2D 5176 bytes
SHA-256: ca022e76c4e48e44dc093fd07a58c5508d4fe1cdd1ac07a33fe1cc7a723091e4
font_01_sfnt_off0000fdb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB1 11316 bytes
SHA-256: 185817ca94445096b288ade9c5b8f17a1d4cd9313fd1ea380f502fa32bdeb082

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