Malicious PDF — malware analysis report

Static analysis result for SHA-256 d088e8e54fbddbc8…

MALICIOUS

PDF

69.9 KB Created: 2020-12-04 20:48:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 70e430e3d82797a133ed946e235caf12 SHA-1: 96e73c408fd8ee27f9311b6d6cb6a02e32a43c9c SHA-256: d088e8e54fbddbc83c99c95ef4d6f1b918d4ebf1a92a6830ab85c275e10a34f0
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://traffset.ru/strik?utm_term=bleach+brave+souls+mod+apk+obb PDF link annotation
    • https://lizosodomig.weebly.com/uploads/1/3/4/3/134327767/8949e2bbd6e49.pdfIn PDF document text
    • https://kezobonuduwu.weebly.com/uploads/1/3/4/4/134457579/laken_xesuterixarifot_vuzikekeb.pdfIn PDF document text
    • https://vizedaxitexoter.weebly.com/uploads/1/3/4/7/134740617/nadoxowodopalupatu.pdfIn PDF document text
    • https://wonidajubiput.weebly.com/uploads/1/3/4/0/134017859/2853284.pdfIn PDF document text
    • https://wesojejupeledaw.weebly.com/uploads/1/3/4/4/134446418/8224764.pdfIn PDF document text
    • https://joxisewegiwazev.weebly.com/uploads/1/3/4/6/134669132/5893834b5e99.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/54c8b536-67d4-49e0-ad02-6311a3fe8d9d/metepivadakizej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eb6f5d6-7797-4371-933f-0514e4635b55/80155038306.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0055e5687f52b6b7c450a/t/5fc0e224f8cdb769c6034fb7/1606476324866/aashto_soil_classification_example.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc566d10b6b03258f537d87/t/5fca72d3e462045bd0f346cc/1607103187848/dental_assistant_chairside_exam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5dec1cc-2b10-49ae-9788-13be4f97d998/ap_lang_rhetorical_devices_essay.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/met_gala_2004.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4e20c8ef7301f8b2a786d/t/5fc7917cb7521d608a49f671/1606914430311/detention_center_jobs_salary.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4e08e8787e879898555ed/t/5fc95b12f6102f0e5ea1fc8f/1607031571496/57989665404.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/zonaburopurizedeburoxa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe17f9f8cdb769c6ab696c/1606293497798/la_paz_weather_in_december.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_off0000d4f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F6 5628 bytes
SHA-256: 167fb24d0e60804a61aed14c1d73597d40fa3e18d6cfe3241e146af800b415e7
font_01_sfnt_off0000e7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EA 10296 bytes
SHA-256: 475f37219359b08f75e6c16bac856ee57d791ebf921b98b2e2b3add2859ce7b4

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