Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d92edd0044733ad…

MALICIOUS

PDF

65.4 KB Created: 2020-12-21 21:47:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: fc2c673c8f97b1b3f9d860be10dcf00c SHA-1: 90196cfe315e47ff8727ad9bc9d36ac05a2b0314 SHA-256: 3d92edd0044733ad48b265fe5cd08453ab9d43cb53c3df40b8a9c5d824e353f6
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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=funfair+ride+simulator+4+apk+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378379/normal_5fd3ccacde2ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480393/normal_5fd918ddb13a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5f929e6126f38.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482870/normal_5fc410774b970.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470678/normal_5fdb0e0e195b6.pdfIn PDF document text
    • https://ruwatija.weebly.com/uploads/1/3/4/8/134846771/pabivute.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370080/normal_5fc37446bc020.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/muvemasoxaji/vazekomag.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdfdbf19d00c472c28c2758/t/5fe0747e51a86c1b6c5438c5/1608545407319/story_comprehension_worksheets_for_grade_4.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/template_dreamweaver_free_travel.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7a1018d6e8c3767c46c74/t/5fd60e9289566e781f45e776/1607863955189/new_meme_formats_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/nofabodixibakokewomudo.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/32624062166.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_off0000c2de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2DE 5296 bytes
SHA-256: 15ccc899c806c1b44611f707e2600d4d7228c1a6645549b2dfaad9bd4786aafb
font_01_sfnt_off0000d4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D7 10544 bytes
SHA-256: de2ac39ad3dc36a7372c04ba86a244830435e2adb68c80e33d08352438412390

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