Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c454850ba97891c…

MALICIOUS

PDF

81.0 KB Created: 2021-03-11 21:57:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: d4893724011e7b9b38c31b1d9ddaa2e9 SHA-1: 9423288cf3d3104cfdb341aacf714b88ec1a0191 SHA-256: 8c454850ba97891c085b6f647af9c66955e1d7f3c796931178bbf58b2f5a16ea
134 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains multiple embedded URLs, with several pointing to potentially malicious domains and link farms, suggesting a phishing or malware distribution attempt. The 'SE_URGENCY_LURE' heuristic further supports a phishing pretext, though the specific content of the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ponafet.ru/award?keyword=alkalinity+of+water+sample+pdf PDF link annotation
    • https://cdn.sqhk.co/nexetifosam/wdIiiiR/74932388554.pdfIn PDF document text
    • http://openplafond.xyz/how_to_put_watermark_on_pictures_in_word46luy.pdfIn PDF document text
    • https://pejolufuti.weebly.com/uploads/1/3/4/0/134018137/5007711.pdfIn PDF document text
    • http://reduslimitalia-official.site/70508604996ptbnn.pdfIn PDF document text
    • https://cdn.sqhk.co/loboremetoxe/a8gharE/gitawoduku.pdfIn PDF document text
    • http://voirlo.xyz/93385388270uw249.pdfIn PDF document text
    • http://housefashion.ru/716518162096trmw.pdfIn PDF document text
    • https://cdn.sqhk.co/vopovaroxamo/HTWhgvO/sutewurovivef.pdfIn PDF document text
    • http://fomilexavekol.22web.org/destiny_2_menagerie_unlock_guide.pdfIn PDF document text
    • http://rkconstructionsucks.com/teachers_union_florida_newsgralz.pdfIn PDF document text
    • https://gitapizi.weebly.com/uploads/1/3/2/6/132683136/4a9a7fa.pdfIn PDF document text
    • https://nukofagola.weebly.com/uploads/1/3/4/8/134883999/lumus_denavukubi.pdfIn PDF document text
    • http://xegomivuz.iblogger.org/other_planets_swedenborg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://3e3188f7-d9e9-48da-9af6-4e6760718ee0.filesusr.com/ugd/4f7562_f225674dae004bda884f626860712189.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jivamubug/14603561048.pdfIn PDF document text
    • http://zuxamivim.epizy.com/lovudujekom.pdfIn PDF document text
    • http://tedizixulore.epizy.com/samsung_dishwasher_dmt800rhs_error_code_se.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/how_can_i_be_lyrics_nela_otuafi.pdfIn PDF document text
    • https://0ef2f354-78a3-4528-990c-72f69c86fc6a.filesusr.com/ugd/6a0da6_deee36c1aef34795924d4b3d99e70820.pdf?index=trueIn PDF document text
    • https://777dd155-384c-4f1d-a337-8f27b94bb056.filesusr.com/ugd/1ecdae_f364e86986084860810504233278775e.pdf?index=trueIn PDF document text
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_d776b11b8be74fdd8403167591662cf1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/povodijirig/australian_healthy_eating_guidelines_for_pregnancy.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/leadership_skills_development-_segment_1_study_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BD 5220 bytes
SHA-256: d5f26dc77b67ca993ad50ea152ffc4dfdfa93056308e6ca4ef73cf62677c3463
font_01_sfnt_off0001037d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037D 10704 bytes
SHA-256: 63f9d0641781bf0fcff9084edd70a71cdaf1b71194736d510161e9bdf0005ed1
font_02_sfnt_off00012829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12829 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34