Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6697939c00aef31…

MALICIOUS

PDF

78.8 KB Created: 2021-06-10 18:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 5c34fb6a6cdc540e820427085b0a64a5 SHA-1: 352a2128907928788b48dcf255c7559f73f8cb86 SHA-256: d6697939c00aef313c5a9e9e37b1e82030c0b9e1a82778c594d3a051c485a1d7
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains numerous links, some pointing to disposable hosting, and a heuristic indicates a lure for remote support tools. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to trick the user into downloading and executing a payload, likely via a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://cdn-cms.f-static.net/uploads/4374708/normal_60c0058eb5736.pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4447251/normal_60305339e60c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469350/normal_5fefd04fed7a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403676/normal_60542432c9b0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466664/normal_5fdbeb1c6223c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_606d4ba527310.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380699/normal_5fee3ed76703c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419198/normal_60326ccde26db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460060/normal_601fca6865d83.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465131/normal_5ffe1955e6b42.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/bVCGPfG74RQ/wb?keyword=what%20is%20the%20default%20admin%20password%20for%20konica%20minolta%20printerPDF link annotation
    • http://xosufixemuf.pbworks.com/w/file/fetch/144442656/can_you_bring_2_carry_on_bags_delta.pdfIn PDF document text
    • http://mumasenekera.pbworks.com/w/file/fetch/144424017/what_to_expect_when_youre_expecting_book_kmart.pdfIn PDF document text
    • http://nukuxim.pbworks.com/f/47443498399.pdfIn PDF document text
    • http://zezimin.pbworks.com/f/break_even_analysis_numericals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2404cdd5-a7dc-48ee-8596-c355bd89f3fe/tubovasabekawotibupos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/834b7818-de46-4c40-8619-a98b902f1424/phrasal_verbs_examples_get_down.pdfIn PDF document text
    • http://mikabipi.pbworks.com/f/papaduliwiwu.pdfIn PDF document text
    • http://jejogitu.pbworks.com/w/file/fetch/144875763/check_baby_percentile__50____Low__0.pdfIn PDF document text
    • http://wovonixir.pbworks.com/f/tuminop.pdfIn PDF document text
    • http://tubekikewabi.pbworks.com/w/file/fetch/144451350/70776083387.pdfIn PDF document text
    • http://mupalunava.pbworks.com/f/ava_food_recall_plan_sample.pdfIn PDF document text
    • http://sozozuboz.pbworks.com/f/bondye_ou_fidel_delly_benson_lyrics.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_off0000f45c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45C 5564 bytes
SHA-256: cb762ada5947d609dca82e1ae75ed8881fdf5ddd42361b56be55c956234d3037
font_01_sfnt_off00010740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10740 11556 bytes
SHA-256: 301cd31736c1c8a514e7215b090bc140fa5141951aae7901509d61db26406da0