Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e038c3002acf7e…

MALICIOUS

PDF

129.2 KB Created: 2021-01-17 23:45:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2e8a5bd75e27c86d3373b57466315632 SHA-1: bfaeea8b674d1c9e97e335f3b5dd17d08b187e36 SHA-256: 48e038c3002acf7e7c29160504e768aeb296fd2cb3e1957ebcef2969d71fb6c9
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 large number of external links, many pointing to other PDF files, which is indicative of a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://traffking.ru/123?utm_term=cardiovascular+drugs+and+therapy+abbreviation PDF link annotation
    • https://foluxafan.weebly.com/uploads/1/3/5/3/135397430/60431b6a6343a.pdfIn PDF document text
    • https://site-1224402.mozfiles.com/files/1224402/bumapavudamiku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f879b9fd0e73.pdfIn PDF document text
    • https://zuxadozi.weebly.com/uploads/1/3/4/6/134662888/fojexel_xunebemidamefes.pdfIn PDF document text
    • https://medefanitinov.weebly.com/uploads/1/3/4/3/134386417/buxidisesadol-tenuz-jabeve.pdfIn PDF document text
    • https://site-1167971.mozfiles.com/files/1167971/electromagnetism_basic_physics.pdfIn PDF document text
    • https://lobavasato.weebly.com/uploads/1/3/1/4/131483685/4253692.pdfIn PDF document text
    • https://site-1177895.mozfiles.com/files/1177895/81051579130.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370090/normal_5fefed282e13f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457014/normal_5fcebb46c2941.pdfIn PDF document text
    • https://site-1166703.mozfiles.com/files/1166703/26125137335.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/gopifu/55726921429.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/elkins_wv_birth_records.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/root_android_sans_pc_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/chilling_reads_to_look_out_for_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/medadele/delta_faucet_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/nelokijamatariviterinun.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/7409555716.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/algebra_1_solving_equations_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/masexojimegumiranofokukoz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000193a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193A6 13148 bytes
SHA-256: 3ce09476dfc9d512fb7cbe69a984e54a7e9aa17f1afcd952460bb0127bfc4d39
font_01_sfnt_off0001bdde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BDDE 5540 bytes
SHA-256: b759162e7211773f0c2c43c928a12f6bab1cd1c77867cb318f964ff7ce7c599d
font_02_sfnt_off0001d0b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D0B2 11056 bytes
SHA-256: f58030aed6f105e4f1be77ef248cfae3ed41eb2b7669ccc072b9343f58b2687a

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