Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69e487ed99e7ce2…

MALICIOUS

PDF

83.8 KB Created: 2021-06-06 04:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e34acba5d923addc71c580375d67697e SHA-1: a03845bc316f258bac4d0e7616374263955750af SHA-256: b69e487ed99e7ce2af81affc546441dd774ecdab67930d6d2c33e8284149a47f
186 Risk Score

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 0.9996

Heuristics 6

  • 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 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.
  • 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://ketchas.ru/pbw?utm_term=how+to+avoid+kidney+stones+during+pregnancy PDF link annotation
    • https://nenafusorez.weebly.com/uploads/1/3/1/4/131453248/xowafagowubenebom.pdfIn PDF document text
    • https://nimizinimaji.weebly.com/uploads/1/3/4/7/134703428/7706478.pdfIn PDF document text
    • https://jetizezososexu.weebly.com/uploads/1/3/4/3/134352600/89df5a2a.pdfIn PDF document text
    • https://fivepixulata.weebly.com/uploads/1/3/4/7/134747110/68105b7a1.pdfIn PDF document text
    • https://kowumawadixowiv.weebly.com/uploads/1/3/4/8/134888970/vojosu.pdfIn PDF document text
    • https://zosetujisux.weebly.com/uploads/1/3/4/2/134266291/bolite.pdfIn PDF document text
    • https://tujelogujonugi.weebly.com/uploads/1/3/4/4/134491942/ce2847a280b52d.pdfIn PDF document text
    • https://lipazugarajoko.weebly.com/uploads/1/3/5/3/135318447/fejokexawoworizuj.pdfIn PDF document text
    • https://tijesefufejeje.weebly.com/uploads/1/3/4/8/134858706/zemuxobelifiwew.pdfIn PDF document text
    • https://sewusadata.weebly.com/uploads/1/3/5/4/135401056/afd8b.pdfIn PDF document text
    • https://vowesajakekefi.weebly.com/uploads/1/3/4/5/134513426/rurulovirajub-sivafatakup.pdfIn PDF document text
    • https://lepomanorep.weebly.com/uploads/1/3/4/8/134856804/mixunesevo-kuvasuwidenesiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jifesepapo.pbworks.com/w/file/fetch/144441699/12985038882.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b2eae74-5979-426c-9aed-cf7eef6049d0/roderick_chisholm_human_freedom_and_the_self_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9dbc4fa-ed1b-45d3-b970-f07f6bef3aa9/fikevoxakapefoguli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a8f7270-d791-4cf9-a23b-578c8047f6b0/twilight_2008_full_movie_in_hindi_watch_online_dailymotion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f69a0260-510e-46fc-948a-fb8061c92709/zedojevegeseb.pdfIn PDF document text
    • http://mevuteled.pbworks.com/f/how_to_join_poarch_creek_indian_tribe.pdfIn PDF document text
    • http://munonoraze.pbworks.com/w/file/fetch/144609246/39408707764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/724b67f7-12db-4093-9fff-e050b3d589de/kevinejatejijavulaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eda0d1b7-06a2-4204-a8de-cd4f11d27aec/40112615631.pdfIn PDF document text
    • http://kigemulu.pbworks.com/f/can_you_bluetooth_a_ps3_controller_to_android.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_off00010986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10986 5488 bytes
SHA-256: 3d42d965d696f8310f0b1a9e97634487fc2811d7495cd1e814a60630f629a563
font_01_sfnt_off00011c65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C65 10780 bytes
SHA-256: 79e274f9279c555065636d02cb3de2c6e1bb38b1a8bda9c8db71c907414d17f7