Malicious PDF — malware analysis report

Static analysis result for SHA-256 7465da1730397438…

MALICIOUS

PDF

78.9 KB Created: 2021-01-11 23:48:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: e44ffa4779c79c33cfb1a4ddfa5b8f89 SHA-1: e779da636f2a7430f9162e9353c6e985bb6dba91 SHA-256: 7465da1730397438e106b26c9b8d98568297b8db370f498e35f17db92705d97a
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a link farm. The ML classifier also strongly flagged this PDF as malicious. Although no scripts were extracted, the presence of embedded URLs and the document's structure suggest it is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffmen.ru/aws?utm_term=whatsapp+plus+terbaru+gratis In PDF document text
    • https://cdn-cms.f-static.net/uploads/4423429/normal_5fdc1326446d4.pdfIn PDF document text
    • https://notapogixunimo.weebly.com/uploads/1/3/4/3/134363186/nenopuxukipegepuxow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497359/normal_5fcaaabb88d1f.pdfIn PDF document text
    • https://davabodijesofid.weebly.com/uploads/1/3/4/4/134474123/5850958.pdfIn PDF document text
    • https://tesujirigagorin.weebly.com/uploads/1/3/4/8/134869290/f3d3703ba.pdfIn PDF document text
    • https://cdn.sqhk.co/bobudozoke/hbBmjhe/kumexafilile.pdfIn PDF document text
    • https://sumibudagat.weebly.com/uploads/1/3/4/3/134310224/660528.pdfIn PDF document text
    • https://vukajikabazaxeg.weebly.com/uploads/1/3/4/7/134711597/6785798.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/xonobijikivo/background_music_for_powerpoint_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/nimusegejefojatori.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/koxetuda.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/angular_6_formgroup.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/plastic_deformation_fracture_surface.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/clock_wave_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/telisutirozekor.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_off0000f823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF823 5236 bytes
SHA-256: 9f3baa45a77bbd50b8ffcec3d5ebc48702fce1f7336c30d066f48a437de757d1
font_01_sfnt_off000109f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F5 10604 bytes
SHA-256: 90c60b69b0937c39a20c05a03ea29d7449d65e33888b20294fde82626ba52694

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