Malicious PDF — malware analysis report

Static analysis result for SHA-256 403215b45e2e8235…

MALICIOUS

PDF

79.2 KB Created: 2020-12-11 19:29:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7086cd3de6f4de3e0ce66d851c8a4e20 SHA-1: 90de89795635ec6a5a6e533e035c967c9d9064b9 SHA-256: 403215b45e2e8235a6b86b305a81cbf35518b3f9291c0c162e96b6f02a83cbbd
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://traffine.ru/strik?utm_term=types+of+mustaches+and+their+names+in+hindi PDF link annotation
    • https://reluxepeguru.weebly.com/uploads/1/3/4/3/134363030/bibimezero_selex.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/runote.pdfIn PDF document text
    • https://xotogulil.weebly.com/uploads/1/3/4/6/134655180/dikizo-fozugobowikew.pdfIn PDF document text
    • https://bovitala.weebly.com/uploads/1/3/4/4/134497817/kitidakunomufifuvoje.pdfIn PDF document text
    • https://warodimaziwini.weebly.com/uploads/1/3/4/6/134611971/2d07c3152.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/vuforewebub/warrior_cats_herbs_for_pain_healing.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/rational_function_transformation_equation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01c62984-1ff1-4628-9af5-f00e4906a1cb/tujevunusa.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/lobudatexadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70d25d09-1fbb-4ff8-b1f7-7e908626d103/fusokejarezazipatu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89ea6cac-6c99-4a9d-ba7f-2bfd1d186bb9/xbox_live_codes_that_actually_work.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/nisokurufijixemukaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a76809d-27ff-4802-b440-8c40479553ed/mudawalasono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e51f38c4-ea0f-441a-941f-b77e323047b6/toshiba_lcd_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8ED 5416 bytes
SHA-256: 777d6623093dfbb5d2dd16b15c9835300f859e95d7dabda48e92da93de70d897
font_01_sfnt_off00010b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B30 10116 bytes
SHA-256: 5124cade29a750ddc31f8fb2aa687edd5cce71abca6effd3f9c9b1ea314a20ed

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