Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5566d9d922571f5…

MALICIOUS

PDF

80.4 KB Created: 2021-02-18 01:37:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 61d179db0b5731999bde7e90d8903a58 SHA-1: bafed9086c5197d4d9f709becfc2b1e65d4c1f41 SHA-256: a5566d9d922571f5104a3a55fb928442fe3af4a9f10b55fc58548e47632729d4
206 Risk Score

Malware Insights

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

This PDF document contains numerous external links, many pointing to disposable hosting, and advertises a download for a "clash of clans hack". The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a phishing lure or a downloader. The embedded URLs and link farm structure suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://seumenha.ru/wix?keyword=download+clash+of+clans+hack+for+iphone PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369919/normal_60272f5d3f413.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/cjhfejg/71997214462.pdfIn PDF document text
    • https://poxanada.weebly.com/uploads/1/3/1/4/131483305/nogesemadij-xaxeraduneluxot-zifironasik-wozuloxixofuna.pdfIn PDF document text
    • https://cdn.sqhk.co/nixivezez/aUihrid/barrett_jackson_scottsdale_arizona_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414696/normal_5fe4d85bc83e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449177/normal_5fec7fe3ba19c.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/eCidQaR/30549970673.pdfIn PDF document text
    • https://wefizaxire.weebly.com/uploads/1/3/0/9/130969527/dugadorojubesewig.pdfIn PDF document text
    • https://lebilelumebik.weebly.com/uploads/1/3/1/6/131636833/mugutabodi.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/icjjgiX/starfish_movie_wikipedia.pdfIn PDF document text
    • https://mizemajawoxulu.weebly.com/uploads/1/3/1/4/131437858/xepepojilaj-dizidif-suwokudegubunul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kapivuvarebe.rf.gd/newesewumuleketakazor.pdfIn PDF document text
    • http://kumesebupaxat.epizy.com/dodowenirijonurikowufalej.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/google_chrome_latest_version_android_apk.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_off0000e42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42C 8128 bytes
SHA-256: db4079aff7d93d0b70c543e8165e48917ac1ee73a542fde209cbd2edaeb4a903
font_01_sfnt_off0000ffb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB9 5396 bytes
SHA-256: c3a02da07e43fdf48f74432a043a78ed4f9361a46626d7a86df3f824e83f8548
font_02_sfnt_off0001122b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122B 10012 bytes
SHA-256: 05cc4420972b3f4c45bef1c041cbff3e5598218b86aeb2690af3e3e9757ce122

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