Malicious PDF — malware analysis report

Static analysis result for SHA-256 e59c485f91e7c065…

MALICIOUS

PDF

83.4 KB Created: 2021-02-14 01:56:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 03f750089e61756d58311d66d80578db SHA-1: 3e8585212be350e0deccbff490a4e7468c4c5108 SHA-256: e59c485f91e7c065ba20893e4f3efc535306fc75b1364fc1e2d9ddbf9d2545e5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm on disposable hosting. The embedded URI points to a suspicious domain, likely serving as a lure or a redirector to a malicious payload. While no scripts were explicitly extracted, the nature of the PDF and its embedded URLs suggest it is designed to redirect users to potentially harmful content.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/wix?keyword=alameda+rare+mobster PDF link annotation
    • http://nesobaka7.xyz/fevaxe0y8hm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443357/normal_601cd0a8ced83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425515/normal_6021a4f1d0d81.pdfIn PDF document text
    • http://lighterusb24.site/gutelusaxolukxjyih.pdfIn PDF document text
    • http://amin-ukraine.net/lunarevefiratesi1gwtn.pdfIn PDF document text
    • https://muboxofibadufus.weebly.com/uploads/1/3/4/3/134310828/risunadebusitos.pdfIn PDF document text
    • http://merovew.xyz/27432355367j72kh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480182/normal_600a81ac5fb00.pdfIn PDF document text
    • http://esmoney.site/xelarikosx7s6k.pdfIn PDF document text
    • http://complect-tech.ru/kuverapuzowebopopsa59z.pdfIn PDF document text
    • https://vidisuxusa.weebly.com/uploads/1/3/1/6/131606291/mezadimesejofape.pdfIn PDF document text
    • http://naturwow.space/33524535366mllc4.pdfIn PDF document text
    • http://proba7.xyz/58733329654jm4xb.pdfIn PDF document text
    • https://gapepaweduli.weebly.com/uploads/1/3/5/4/135400658/1ae4398a12.pdfIn PDF document text
    • https://devigafaviv.weebly.com/uploads/1/3/4/6/134698058/fapagefinukuvademana.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/nuvukivaxiren/challan_form_aiou.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/pavalidevidesekasatafe.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/agent_sai_srinivasa_athreya_bgm_zedge.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_off00010b9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9B 5100 bytes
SHA-256: 13ce11010458701961a90a55c81165a9f3d1e5947fef2af5673e35ab21b863e0
font_01_sfnt_off00011cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD1 10616 bytes
SHA-256: 6e05dba27e0a63dd888d67c426723ca8ca026be21b7d18e5a160f33e4129d2d4

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