Malicious PDF — malware analysis report

Static analysis result for SHA-256 aae269f9dba98ff4…

MALICIOUS

PDF

74.3 KB Created: 2020-12-27 07:31:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 18966ec118007208901574dbb6214a55 SHA-1: 7112bc86fc60f889a24c4f9edf0f51522709d281 SHA-256: aae269f9dba98ff46c066246713f054754065b2b93c945efd03177eb7aca2d26
244 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a phishing lure. It contains a large number of external links, many of which point to disposable hosting or redirector infrastructure, suggesting an attempt to drive traffic to malicious sites. The embedded content, though obfuscated, appears to be part of a link farm designed to deceive users into clicking on potentially harmful URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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://cctraff.ru/aws?utm_term=bible+application+for+java+phone In PDF document text
    • https://cdn-cms.f-static.net/uploads/4482415/normal_5fd182e13190a.pdfIn PDF document text
    • https://cdn.sqhk.co/niminililez/igihaDx/41041347350.pdfIn PDF document text
    • https://jawuvufos.weebly.com/uploads/1/3/4/8/134856807/3981592.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414695/normal_5fa683579a28a.pdfIn PDF document text
    • https://jajonugofetafis.weebly.com/uploads/1/3/0/7/130776034/kalodefutatomogixeno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379736/normal_5fa89e00a06da.pdfIn PDF document text
    • https://zefutijokizire.weebly.com/uploads/1/3/4/8/134868110/nidujerofek_sunelakepuxo_texefaresavudas_vosupaxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f903545b3e82.pdfIn PDF document text
    • https://cdn.sqhk.co/bitubebo/wifjihF/world_of_stereotypes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386605/normal_5fa2a16328089.pdfIn PDF document text
    • https://likerediweraj.weebly.com/uploads/1/3/4/6/134691167/sijedimofalibij.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/0111c10c-5572-4750-9a62-c952c62ab397/ziperabiwugowazedafiniwi.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/camara_de_seguridad_android_sin_internet.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/icloud_unlock_service_tool.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_off0000e46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46C 5252 bytes
SHA-256: a88decb3690061bc87d77a42c2016ba2d6941e28726fd72e057ddab7712bd794
font_01_sfnt_off0000f654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF654 11100 bytes
SHA-256: 7fd824f301849a37921eeaeaf315cf2ba26517e927ee1a68d76d01b7e5a26fed

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