Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe2dd4efb37061a…

MALICIOUS

PDF

64.6 KB Created: 2020-11-25 04:29:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: cd9c0790db6c06ce9237957f949af28f SHA-1: b8e99b2b5d8804c6d94884ca82835a4909d6d902 SHA-256: efe2dd4efb37061a53cf962ba86dcf8510c7c64af107250544098a102ba57e22
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing and SEO link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs point to suspicious domains, suggesting the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/strik?utm_term=fire+force+episode+19 PDF link annotation
    • https://xidonojozam.weebly.com/uploads/1/3/4/4/134498592/7058236.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480162/normal_5fa76da0e1d3d.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/fffacc.pdfIn PDF document text
    • https://denasigetul.weebly.com/uploads/1/3/4/3/134332190/kimovamajapelarok.pdfIn PDF document text
    • https://pudukodup.weebly.com/uploads/1/3/1/4/131407572/pobadexadidanavaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369655/normal_5fa5280d21f47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389794/normal_5f93bc2c51b0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372101/normal_5fb80fc07c994.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/vuxagixil/cima_strategic_case_study_examiners_report.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/bar_keepers_friend_msds.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/53921774606.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/26068553876.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/spotify_premium_apk_free_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/super_hotline_miami_2.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/40764901793.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/baporesu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E9 5072 bytes
SHA-256: 7cccf98adb8944a831a4e1387b245d8ee610a022e73ba85aba213d1c3f499f7b
font_01_sfnt_off0000d347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD347 9924 bytes
SHA-256: 983d162db605950e400229e813754c0d25d477f4dadfd3786562de9a1ab5516b

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