Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5ef8246b2571340…

MALICIOUS

PDF

72.5 KB Created: 2020-12-25 05:58:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 45854b0a243b90ae0c280412aa1709cb SHA-1: 9f8562f8159311dd3fb50e1b4c1446ce3b9d1966 SHA-256: c5ef8246b257134049a21fd43e13fadf11604406a3c15f004d2a1c165e15dc2a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on suspicious domains or are part of a link farm, indicating a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous embedded URLs point towards a malicious document designed to lead users to external, potentially harmful content.

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 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.
  • 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://traffset.ru/aws?utm_term=cancer+de+cuello+uterino+monografia+pdf PDF link annotation
    • https://rilemiwekeb.weebly.com/uploads/1/3/4/5/134599700/vujonenovaduner-mupukuj-lupanebipot.pdfIn PDF document text
    • https://fowuwulavo.weebly.com/uploads/1/3/4/7/134754099/1c318187a107.pdfIn PDF document text
    • https://cdn.sqhk.co/nezusoxe/jijex1c/jewels_star_2_kostenlos_downloaden.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f89886db11c5.pdfIn PDF document text
    • https://ranemexamegen.weebly.com/uploads/1/3/4/4/134440137/rovoxukizujereribo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498882/normal_5fe1bd5de1ef2.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/4155339.pdfIn PDF document text
    • https://cdn.sqhk.co/tinajugezepi/RZuRNR5/super_word_search_puzzles_baking_christmas_cookies.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/gotitibekovi/warcraft_armies_of_azeroth_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/citizen_eco_drive_watch_manuals.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/life_choice_keto_supplement.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/34211679927.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/zekofededumitifigibutesi.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0C 5204 bytes
SHA-256: 0949a2b49d944d1578b6847266852c5a2897d41ce6a0ec2741397a08cf394c7b
font_01_sfnt_off0000edaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAA 11496 bytes
SHA-256: e808c4a005bff5bc30eae6bd81fd84d0133e378bac4bb99d019b3492fe335d79

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