Malicious PDF — malware analysis report

Static analysis result for SHA-256 68d9a76275ff9c66…

MALICIOUS

PDF

77.3 KB Created: 2020-11-10 18:42:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f5af13a210ecdbeca168f98280486bd3 SHA-1: 98adb714a6b1f5d3ee7d732eeaa2cc3825b87060 SHA-256: 68d9a76275ff9c66945adc2a4c5be0afa66bf196f91d60fb5425cb8480657e88
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 0.9997

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://traffset.ru/123?keyword=smite+codes+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389823/normal_5f92e9a37f8b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369912/normal_5f8e5ed4d296c.pdfIn PDF document text
    • https://pusigodumutujor.weebly.com/uploads/1/3/4/6/134610993/lurewexa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382631/normal_5f91f3b129149.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368244/normal_5f99eb686547c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/ropuba/orono_high_school_phone_number.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/ramadan_2020_starting_date.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/polar_ft7_heart_rate_monitor_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/ruzemugaveborigodilur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/159280cd-5744-4794-a57a-271791bd24b4/tibiwotiwiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8319afcc-f121-49cb-a427-e9fe775ab06a/sony_mex_xb100bt_user_manual.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_off0000e78f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78F 4708 bytes
SHA-256: 0ee16b369ab4599f868c38d8c06eaa6ac484143f09a654810c7beb97fa830976
font_01_sfnt_off0000f788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF788 10192 bytes
SHA-256: dd718dbbd9ebbb14402cebdfc8c946f66f3d0e670195844244daea1070aa6a5d
font_02_sfnt_off00011a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A67 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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