Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c276300d6869456…

MALICIOUS

PDF

70.2 KB Created: 2021-02-28 15:52:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b997b5b1c9357696955b57efc620c839 SHA-1: 7e108d767f5e71fdb1eded7d43964fe5bd889b50 SHA-256: 4c276300d6869456e1d41dd9cf58960597297254eb273084d0dd1c454c13b8c3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external links points to 'https://baarspo.ru/123?utm_term=el+juego+de+la+vida+y+como+jugarlo+audiolibro', suggesting a phishing or content-luring attempt. While no scripts were explicitly extracted, the nature of the link farm and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://baarspo.ru/123?utm_term=el+juego+de+la+vida+y+como+jugarlo+audiolibro PDF link annotation
    • http://nopokavami.iblogger.org/vujujavapen.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/ggiihsy/75721997680.pdfIn PDF document text
    • http://buytoday.cc/manuxononogivevijutoji3590.pdfIn PDF document text
    • https://nurufumetexode.weebly.com/uploads/1/3/5/3/135323779/fuxevu-dojuveleboputuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473926/normal_602fb7932eee0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pijofabuzipa.rf.gd/black_wallpaper_hd_1080p_for_pc.pdfIn PDF document text
    • http://votofeki.epizy.com/77605878108.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/childrens_story_books_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/42588248025.pdfIn PDF document text
    • http://gorevifero.epizy.com/covalent_bond_questions_and_answers_gcse.pdfIn PDF document text
    • http://zopimubusa.rf.gd/how_do_i_connect_my_bose_remote_to_my_samsung_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/used_fisher_price_baby_swing.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/cicatrices_regulo_caro.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A5 5112 bytes
SHA-256: 34562dd9795839e01fca6d01666693e24ed0c8e2bb1c061a82a1575537f1f9e1
font_01_sfnt_off0000da18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA18 10172 bytes
SHA-256: 63564a1e99cbe9d38fd385b913cdbeb6a506221d2f586483aa4b87ca9305e0d5
font_02_sfnt_off0000fb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB78 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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