Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e49e4325c52865a…

MALICIOUS

PDF

78.1 KB Created: 2021-02-21 08:48:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c8356ac29722f41b91d36b9057731aba SHA-1: 932303e2265cf8d1ac9737cfb77b68a7f28e4627 SHA-256: 6e49e4325c52865ae073869b8d0e68bff8c2e1eb084c39247d37db8a0400636d
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://druttle.ru/strik?utm_term=is+artemis+fowl+worth+reading PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367951/normal_602b26ebb1648.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490129/normal_6001cf59527b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482671/normal_5fd32d864d552.pdfIn PDF document text
    • https://kibowoje.weebly.com/uploads/1/3/0/7/130775027/jetabekotapo_piguketo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487381/normal_5fe56e6268336.pdfIn PDF document text
    • https://gedijidejejew.weebly.com/uploads/1/3/0/7/130775336/mejiju.pdfIn PDF document text
    • https://xudezilo.weebly.com/uploads/1/3/0/7/130739240/guvita.pdfIn PDF document text
    • https://jiviwakabukowe.weebly.com/uploads/1/3/4/0/134096071/fivef.pdfIn PDF document text
    • http://mutinujevax.22web.org/lijubane.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456393/normal_6012b22edf79f.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/7dGpgcw/tribal_octopus_tattoo_designs.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/xisefowu/ramogibuwa.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/lenoruwapenosokoxulol.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/lifting_equipment_register_example_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/be_safe_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/free_template_powerpoint_canva.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_off0000f5b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B1 5352 bytes
SHA-256: 4de908d1eb657b8aa55b5720e1a5321053d12f6c22a2855d0342b1baac7d4f05
font_01_sfnt_off000107ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CA 10516 bytes
SHA-256: bff84776d41bcd00c14c96679fac6b41666340c7ac393b96aa1520d855dc2f61

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