Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bdf6161f93356ea…

MALICIOUS

PDF

77.2 KB Created: 2021-03-23 03:14:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 85b2f6eb2164bb6751a362b6a122e4b7 SHA-1: 59d897456c28f0de098163de573178fe286b13eb SHA-256: 7bdf6161f93356ea80496042a2e85c0f7f290d6765118a90afc52484d964ebb0
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 0.9997

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://jumiwimov.ru/wix?keyword=minecraft+death+counter PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385631/normal_604eb61743e88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481275/normal_60159b731e4bc.pdfIn PDF document text
    • https://legupapepunune.weebly.com/uploads/1/3/0/7/130776309/sixaxofaroluv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376602/normal_60176f3a09783.pdfIn PDF document text
    • http://berkeciftci.net/adventureland_iowa_hoursx8ps5.pdfIn PDF document text
    • https://kabudinikibe.weebly.com/uploads/1/3/4/7/134716255/8105849.pdfIn PDF document text
    • https://zajebujop.weebly.com/uploads/1/3/4/9/134902249/9056776.pdfIn PDF document text
    • http://reawolt.online/690098968419rkqy.pdfIn PDF document text
    • https://nirefuriwubava.weebly.com/uploads/1/3/1/6/131637308/6971988.pdfIn PDF document text
    • https://lemorixumo.weebly.com/uploads/1/3/4/7/134748879/9169142.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/650d4839-627e-47cf-9a6a-f032fd8316df/42914917603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1638a508-67cf-42cb-89d8-9aed21232c2d/bixenefusesafam.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/xipolofidobalavetabuto.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/23782717192.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/rakulu.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/actos_de_comercio_libro.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/jelumanulijarezeweraw.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/six_steps_in_appraising_employee_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/dokilimunur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a0fe840-e0fa-4e70-9c94-e414b9d94067/throne_of_glass_series_reddit.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_off0000ef3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3C 4904 bytes
SHA-256: 19da5062b4e21eecb5b2ac336674108787d07287feb28073bf8c47040e00c219
font_01_sfnt_off0000fff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF0 11764 bytes
SHA-256: cabf2fb97a76fe707319cd45ee15cd8259b5caf7309adeac800d20a81ceacdff

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