Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d9fb37d267d5720…

MALICIOUS

PDF

73.4 KB Created: 2020-11-19 11:58:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b9ecbbed9d93cabd5e01e400f42670e3 SHA-1: 1c4c62743a5dfd7f50ef059e01b1c9044478c09e SHA-256: 2d9fb37d267d5720215362d082372a6185ee19f354656daa87414c3e9d8e1493
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to 'video viral de la china de facebook'. The presence of numerous links suggests an attempt to drive traffic to potentially harmful sites, possibly for phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?utm_term=video+viral+de+la+china+de+facebook In PDF document text
    • https://fidumozif.weebly.com/uploads/1/3/4/7/134715024/5899364.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404990/normal_5f94751e6b614.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401545/normal_5f9546f254b38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374198/normal_5f902e09631ca.pdfIn PDF document text
    • https://xotuwajugi.weebly.com/uploads/1/3/4/3/134349857/7e2f8dfa.pdfIn PDF document text
    • https://juzomewe.weebly.com/uploads/1/3/4/3/134350864/lotimimodofapojo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369174/normal_5f9216327c264.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368976/normal_5f8de549c3da4.pdfIn PDF document text
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/batibiziniriki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426547/normal_5faa3b89bfdf4.pdfIn PDF document text
    • https://wavuvavezexa.weebly.com/uploads/1/3/0/7/130775629/dubaxaligiwiso-tusola-xatagi-kaworij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483837/normal_5fb3f5e75ba6d.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
    • https://s3.amazonaws.com/rekibedafowow/sugar_busters_book.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/principles_of_physics_10th_edition_solutions_manual_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/gcse_maths_november_2019_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/high_school_transcript_template_excel_free.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_off0000d42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD42A 4868 bytes
SHA-256: 134d805e5543db28880b81bb297309b3d6a4c512302b658ad7aa4bf8cbc61972
font_01_sfnt_off0000e4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A7 11196 bytes
SHA-256: 42584bdb4aea8feda260031ce7da95b8c11fe02bc6f212d25eb99a5d51bf472d
font_02_sfnt_off00010abf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABF 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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