Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3c0861545e36cf8…

MALICIOUS

PDF

59.1 KB Created: 2020-11-13 08:46:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: b3a6741f243eb7785719a0435c98dfd3 SHA-1: 8a4e60b0fcdb256b407def18d097dfd4132f0eb9 SHA-256: c3c0861545e36cf8512a522081df0db3da53a258b4883161cd070737fc72fca3
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the heuristic firings suggest this document is designed to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://gettraff.ru/aws?utm_term=bekhayali+full+screen+whatsapp+status+video In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380545/normal_5f90518759065.pdfIn PDF document text
    • https://xufibafit.weebly.com/uploads/1/3/4/4/134403857/suveju-xodagitakutog-luzumebex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421208/normal_5fa11994ef419.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480174/normal_5fa715ed2716a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405638/normal_5fac01be5d9bb.pdfIn PDF document text
    • https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/juvuralumemorum-demeni-xomevatoxesumad-kokojo.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/6dc5fd3f-3e08-403a-bfe6-073692e8afd3/bmw_suv_x1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b81fd5d4-e07a-4953-88c8-6a3f54403533/lion_beaver_otter_golden_retriever.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba78a25e-22e5-4bfc-84a3-3cc88532cc26/nojod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef547dd3-31b0-47db-87b8-9e37b4e4bf27/92431307957.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b7d5281-bde6-43e0-a80c-795f98a90e58/77753856164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61e05206-562c-466a-b528-33215106b289/iroquois_middle_school_staff.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3919e9fd-a6de-44df-8930-215e2c71ddee/36381840887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17dbd4e7-8447-4769-a94f-23b478d1e749/sports_tennis_heads.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/243027cd-5265-4cb8-8a5c-746167f1def0/82589841848.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7048629-63fc-4b48-999b-7cfe0dac4a8f/marlon_stardew_valley.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19db1088-65c5-4678-9441-dd0b83beac73/11474215149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9918a2fa-aa74-4f8e-a2ca-eba1f098d39a/paper_tuning_frame.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_off0000ae82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE82 5608 bytes
SHA-256: e1349fe7df8c4b43c6b571633977f8f5bfcf8febf380799ac572851251e2bb26
font_01_sfnt_off0000c1bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1BB 8692 bytes
SHA-256: 0d6e2d0a9cb672c944b775189c6ea0488f600b4036a046ebc0861b29ff844ac2

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