Malicious PDF — malware analysis report

Static analysis result for SHA-256 3df300288db6c4ad…

MALICIOUS

PDF

72.3 KB Created: 2020-11-13 18:20:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9b95af296ce68fab252d81a5dae5ade5 SHA-1: 1123fe5113a1cf7b9950cddefdeda0da05641553 SHA-256: 3df300288db6c4adfb470db0f371842e364a9e29e98cb3ee6373d9f57ace175a
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-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://trafffe.ru/strik?utm_term=acronis+true+image+2020+iso PDF link annotation
    • https://xamegazu.weebly.com/uploads/1/3/4/4/134440804/467604.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/2122744.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/d2959817b214.pdfIn PDF document text
    • https://pupaxutakigi.weebly.com/uploads/1/3/4/5/134579126/e6322bfd8.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://uploads.strikinglycdn.com/files/fb60fefa-0211-42f3-93aa-60fc70c2db6b/how_do_charter_flights_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78460c49-376f-4f62-ad08-75e807e34ab3/stochastic_processes_sheldon_m._ross.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c917ad3-8187-4fa0-92d8-ee86e07d584a/philips_respironics_system_one_servi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0a274e0-c11d-4a1d-858a-7be6fc98bb6a/dudusiduxafavaxemoluse.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/foxesoganomen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8b5c543-7cbd-4e2e-9ef4-48cc9761b579/prima_32_lcd_tv_lg_vs_samsung.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/6982818832.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/69346908704.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/bejixagifiduded.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/hydraulic_tube_bender_conversion.pdfIn PDF document text
    • https://s3.amazonaws.com/digigitusuduk/south_carolina_state_standards_2nd_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d810ded-886e-4b54-be61-c9f06aecaf00/26150691223.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/nexajiremed.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_off0000d050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD050 5232 bytes
SHA-256: fe5495003f1f3d79430653822bad0dd99a0b95a5bb793357ad91aa1394552d8c
font_01_sfnt_off0000e1f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F4 10480 bytes
SHA-256: 0fe8957061160f785d22ab3cb80b93ed044698c0baf03c9cb5950ae4341537e5
font_02_sfnt_off000105c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C3 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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