Malicious PDF — malware analysis report

Static analysis result for SHA-256 16cc3e3f864779ad…

MALICIOUS

PDF

76.5 KB Created: 2020-11-18 19:08:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 202aba37c739ff3bfe7dbe024c97fecd SHA-1: d57125ce5ef0c30992e924b80819fdbd7f548f90 SHA-256: 16cc3e3f864779ada3d00949353deff3040119e2aade9982f210437a780845e2
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://traffking.ru/123?utm_term=north+pole+rock+and+roll PDF link annotation
    • https://favesalaliba.weebly.com/uploads/1/3/1/3/131384568/xetamezasowikiji.pdfIn PDF document text
    • https://pamuvomamutafa.weebly.com/uploads/1/3/4/3/134305197/68744827d6a80.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/jeponowon/android_create_attributeset_programmatically.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/booz_allen_stock_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/12609102187.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/96994764211.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f4cdc00-9f32-48f2-ab61-5a3d9942a108/23364591550.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/chicago_gentrification_report.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/jtime_associate_kiosk_at_home.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/sawgrass_movies_theater.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/halo_encyclopedia_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d278d931-963b-4de6-b62f-59efcbcff985/3457517298.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/brentwood_school_uniform_policy.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/fluoroscopy_guided_bronchoscopy.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/81438007716.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_off0000e0ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EA 4756 bytes
SHA-256: 7b8091ef5aa94fd75dc14acfe7d27afc46ab025dd963081438f736d5b0c98772
font_01_sfnt_off0000f105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF105 11028 bytes
SHA-256: f4cfc42c876d961e8107b1a08d9782eea368a8cb3ecf0fc6d46367c1752d6a05
font_02_sfnt_off000116b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B2 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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