Malicious PDF — malware analysis report

Static analysis result for SHA-256 01fe3cf7af9ed38d…

MALICIOUS

PDF

74.8 KB Created: 2021-06-06 01:15:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 53be4af0cc851f005c3d0ac323935cdb SHA-1: 74a76157410fc798f3ad70ea1fe06b2c97e16fa9 SHA-256: 01fe3cf7af9ed38d6a43b0b88fa137219f1e364b7f6d3ebaa901379f1ecea03c
194 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://queure.ru/pbw?utm_term=need+for+speed+most+wanted+mac+os+x+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411512/normal_60443f22e640b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415065/normal_6013bee108ea6.pdfIn PDF document text
    • https://pedomolakikivo.weebly.com/uploads/1/3/4/4/134440841/6ae85bcb8.pdfIn PDF document text
    • https://lesamasipedu.weebly.com/uploads/1/3/0/7/130739144/9355031.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497688/normal_6016c10b7705b.pdfIn PDF document text
    • https://watepiwod.weebly.com/uploads/1/3/2/7/132710700/joledofufil.pdfIn PDF document text
    • https://bunemevomuw.weebly.com/uploads/1/3/4/7/134733911/nokiwumapen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402246/normal_5ffe469095d85.pdfIn PDF document text
    • https://tagipuzato.weebly.com/uploads/1/3/0/7/130776724/c3a3282b7.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/126b02fa-48eb-494d-97f6-5e4eed53aee4/46600667552.pdfIn PDF document text
    • http://jebusolole.pbworks.com/f/55192737768.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2542f889-3551-4dad-b2cf-8f5d3979caaf/what_is_the_difference_between_restraining_order_and_order_of_protection.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b49f410-7af8-4ae7-8011-b0170626fa2f/sofowosotudasewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6e66c0b-5f21-4f09-93a2-69f115b088b3/99370842855.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/372215e6-9c33-4a06-8d84-a3e3858b53bb/how_to_make_undetectable_payload_for_android_in_termux.pdfIn PDF document text
    • http://poxanoralanu.pbworks.com/f/where_are_rusa_deer_found_in_australia.pdfIn PDF document text
    • http://funinupun.pbworks.com/f/airplay_app_android_tv_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/712c90bb-0654-4cb4-9fd8-22ca3838cff3/12148966624.pdfIn PDF document text
    • http://lopofemusun.pbworks.com/f/what_is_astral_in_prodigy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61b09c9c-8730-4b9f-8a61-4c5b7607f429/4037459555.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56851006-5a03-4064-a2ad-96154a23e4b0/81514718951.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b79db5a-7485-4231-8628-f5076b9ebc5b/kududu.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_off0000e74a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74A 5428 bytes
SHA-256: 13dcaded695ecbcd355370a2e1fac09c5775e16f1899c3837448cbb551893f29
font_01_sfnt_off0000f9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C7 10540 bytes
SHA-256: 8c97009afdd22ad9bb0dabe9c7e01c32ef27312506800065fc0229385ee92429