Malicious PDF — malware analysis report

Static analysis result for SHA-256 38aa6f6faf45df2b…

MALICIOUS

PDF

118.3 KB Created: 2021-03-15 00:14:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4476b25cc3819a7892c3265c4f0c5d53 SHA-1: 7d8c74be2f78907f456039ca4015ca826651dcfb SHA-256: 38aa6f6faf45df2b32d1f5618d584c656cfae1c48bc2afa699b7c0d9f91d52ba
184 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The embedded URLs and the ML classifier output strongly indicate a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and malicious links suggest it's designed to redirect users to harmful sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 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.
  • 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://dafemum.ru/award?keyword=biopsychosocial+spiritual+assessment+pdf In PDF document text
    • http://virona.org/macbeth_act_2_scene_4_analysisyiezc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382617/normal_60170ca5a4aa2.pdfIn PDF document text
    • http://copyrightnotice-ig.com/bojupibcnem.pdfIn PDF document text
    • http://gunofixe.medianewsonline.com/78294097893.pdfIn PDF document text
    • http://netzamka.ru/vituwa7wjdh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477400/normal_601914b8af916.pdfIn PDF document text
    • http://gaydating.world/32023481283aytuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416928/normal_601d59f0f01aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500189/normal_6008d6bcd6686.pdfIn PDF document text
    • http://boketizabujig.scienceontheweb.net/lubatofasogozasinofi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498994/normal_5fcbcfa7bb51a.pdfIn PDF document text
    • http://whysmall.space/88333195308cqi68.pdfIn PDF document text
    • http://liwexun.mywebcommunity.org/chemistry_organic_compounds_list.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418000/normal_5ffcaa3b2f54c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414360/normal_601e26710f6fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475397/normal_5fe4e0a100c77.pdfIn PDF document text
    • http://puzofogerexiwi.22web.org/tamilrockers_abcd_movie.pdfIn PDF document text
    • http://sowipilarow.mygamesonline.org/kazuvafokaminat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ligekasuxube.onlinewebshop.net/bulleh_shah_biography.pdfIn PDF document text
    • http://dakokaxawizepu.epizy.com/vevupenekofunem.pdfIn PDF document text
    • http://kufekisawisewo.onlinewebshop.net/jumefuxukavinafaf.pdfIn PDF document text
    • http://jumepenitujox.atwebpages.com/diy_kitchen_nook_ideas.pdfIn PDF document text
    • http://wabinugo.epizy.com/zawiriw.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_off00019308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19308 5544 bytes
SHA-256: e50207ac155edb75672d8fe02a480cd5605594ea7d74f9137838cf13e3803519
font_01_sfnt_off0001a5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5C3 10928 bytes
SHA-256: da22b011a97dbfee5b75ef058766d978ed980b6e95956b6c03300bcc2299ffcb