Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e3209dcc86d0181…

MALICIOUS

PDF

60.7 KB Created: 2020-12-18 13:29:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: eb6c3ada47a96754aee18dc1d4291954 SHA-1: 9c2471db28a99e7f69266ba214695f96874f7620 SHA-256: 5e3209dcc86d01813f1dfeb62d8548107f37913842b30cdddbcd4a13aa974e36
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link pointing to 'cctraff.ru'. Another critical heuristic indicates a PDF link farm, suggesting an attempt to distribute or obscure malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

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
  • 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://cctraff.ru/strik?utm_term=alleluia+hurry+the+lord+is+near In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5fb702e02ee41.pdfIn PDF document text
    • https://jexafowasefuxuv.weebly.com/uploads/1/3/4/5/134588667/8551288.pdfIn PDF document text
    • https://jojawetoterul.weebly.com/uploads/1/3/4/4/134404105/jufokusevegul-zojuzovevir-supawe-waziwariserusot.pdfIn PDF document text
    • https://wawodupalise.weebly.com/uploads/1/3/4/6/134621762/giwiwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448339/normal_5fad665d30227.pdfIn PDF document text
    • https://gofobodobade.weebly.com/uploads/1/3/4/4/134444694/rivure.pdfIn PDF document text
    • https://biwomewiwuxe.weebly.com/uploads/1/3/4/1/134131409/abe1c.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://static1.squarespace.com/static/5fdc7d305fcdb718a17c69c1/t/5fdc8f2bd1d11b6b5bc18551/1608290091815/2018_irs_capital_loss_carryover_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2ca3a3dfdd95b60e15de0/t/5fcac73f9114cf21bd0e9650/1607124800279/nalujidip.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dfe77d0c8f249d40ab54/t/5fc14d1f1972c46e3ccee1f0/1606503712525/is_freezing_exothermic_change.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc529d86609fd0ee7ad3c2c/t/5fc96becdffee5551511e564/1607035887992/lamidopiparigaxapevoguf.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7acbda4492a057e24fc6f/t/5fcc7fed2bc7884852ae183f/1607237615387/waxokimubuwonurojopixumev.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce7c2cb34b2f1f83086fe6/t/5fd743b75488895576c75f73/1607943098648/xejomufetaselusezijik.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5a21e18c5c478ef3437c/1606375970722/sony_portable_dvd_player_dvp-fx750.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_off0000a997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA997 4888 bytes
SHA-256: 4845bccdc3c935d389edefa1e644466682bd155ecb0afee38becca6130055c8d
font_01_sfnt_off0000ba2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA2A 8748 bytes
SHA-256: e87bfca614ff93577641827a7aa6f9163e50d538bc2086ed5f8a5788ec6607de
font_02_sfnt_off0000d80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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