Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f2bf90cbf296490…

MALICIOUS

PDF

78.7 KB Created: 2020-11-18 22:27:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0966b203facaa1d2d2cc3e23b86a81a8 SHA-1: 1480e110354b2176d62a6f6273e323c14f8b54f9 SHA-256: 5f2bf90cbf296490684542b096216c0627c5a79939378601a0ae70ffced97085
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=um+chuveiro+de+2400w+funcionando+4+horas+por+dia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393790/normal_5f9bb75adb7bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467032/normal_5fa3f2b50f2dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383295/normal_5f9ebf39385b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368979/normal_5f8884ce3f092.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374013/normal_5fb5758b40f4b.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/debizikirapanas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409420/normal_5faa33c9ce1f9.pdfIn PDF document text
    • https://suludizivot.weebly.com/uploads/1/3/1/3/131383823/6688592.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456398/normal_5fad60900b0ac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/49b48ed0-00ab-40b0-8232-199a93744476/87625232280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57c997a4-0f6a-498b-b16b-638ccc6512c5/group_of_dogs_clipart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/245dd255-f01f-4c7c-bc80-cf9ca253f39f/lanilodarumibasuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1599e2af-9bf5-4f4a-9129-aad5de9021af/53923853189.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55b53b9b-0db8-4ed8-9aef-b7b07940470d/the_penguin_history_of_latin_america.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac56615e-6398-41fd-b2a6-ddb45f50c634/actualites_nice_matin_menton.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6195129-937d-45fd-8f4d-b0df700538a6/present_simple_form_exercises.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EB 2900 bytes
SHA-256: a28fcc4ba65d8171a55e8b87d646ac5d1dd213f66ab2b0026fd39e5ca5d32d1a
font_01_sfnt_off0000e22d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22D 5868 bytes
SHA-256: c6d9ece87bab4303e42ab1ef5782ff3944f85b1d139828838c8f50502338854d
font_02_sfnt_off0000f61a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61A 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_03_sfnt_off0001017d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017D 13588 bytes
SHA-256: 108d2401615e7f1e0e6e65f6ea7aa6337b8795622208216a52b7857c646a8deb

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