Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d65864bc0d5f188…

MALICIOUS

PDF

70.8 KB Created: 2020-12-21 06:56:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f81cf65bfe8271b3d7edaf197c768956 SHA-1: ec181fc2a120630b2fc07ad710207d83e396451b SHA-256: 1d65864bc0d5f18828ae118ce96a8e3b5acec34257a3e565ff3bbdee87a4aa39
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a link farm suggests an attempt to direct users to potentially harmful content or phishing sites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=om+nom+nom+nom+meaning In PDF document text
    • https://federadedeladol.weebly.com/uploads/1/3/4/6/134626130/nanurezerika.pdfIn PDF document text
    • https://sujujiga.weebly.com/uploads/1/3/1/3/131379538/kojaxoragup-zijixekofub-kekimuritu.pdfIn PDF document text
    • https://daxuregivav.weebly.com/uploads/1/3/4/4/134431970/1869889.pdfIn PDF document text
    • https://morupataniseb.weebly.com/uploads/1/3/4/5/134502176/razikapujokow.pdfIn PDF document text
    • https://tamipabofoj.weebly.com/uploads/1/3/4/8/134876193/3242922.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://static1.squarespace.com/static/5fc5c113ff13940aa260d1f7/t/5fcf42545c8977691e3874ce/1607418453184/my_talking_tom_game_download_apkmonk.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/anatomy_and_physiology_coloring_workbook_87.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/cruise_reviews_berlitz_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0805cd49dd12447321748/t/5fcab4d19f1ed260783d609d/1607120083395/98930780561.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdf5d5f077091095999da09/t/5fdfc9f215a11837d0c5a4b5/1608501748533/86688015856.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/apple_developer_s_xcode.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/nakorikunajijilifofotiram.pdfIn PDF document text
    • https://s3.amazonaws.com/juxatop/jeppesen_airway_manual_europe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e514e672-5237-4460-a351-29345aa70ca9/lumixa.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_off0000cbe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE0 4436 bytes
SHA-256: 51d54640ff30a73cab68ac4654c39c58d1081898c454e515e08e0dc148115607
font_01_sfnt_off0000dac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC7 11108 bytes
SHA-256: e80ba0ae7246f0f61bbb175f4dfe04c4d61b3aac15fec342f425c55437302a3f
font_02_sfnt_off000100a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A1 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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