Malicious PDF — malware analysis report

Static analysis result for SHA-256 af39d398d61189ae…

MALICIOUS

PDF

77.0 KB Created: 2021-03-12 11:44:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 15e7c8f5b0bbd5e32b3d38fb88fe6133 SHA-1: ddf2655c8a4f93dd32e4ae19d75dbd81fd69d408 SHA-256: af39d398d61189ae72edf0880bab972791df513983516a9a6bd33f61a2bb3ea6
264 Risk Score

Malware Insights

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

This PDF file contains multiple heuristics indicating malicious intent, including a critical finding of a malicious redirector link pointing to 'https://dafemum.ru/123?utm_term=critical+ops+hack+apk+android+1'. The file also exhibits characteristics of a link farm, with numerous embedded URLs, suggesting an attempt to distribute or host malicious content. The ML classifier and ClamAV detection further support its classification as malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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/123?utm_term=critical+ops+hack+apk+android+1 In PDF document text
    • https://soxapibojewaw.weebly.com/uploads/1/3/5/3/135345372/3812389.pdfIn PDF document text
    • https://kigazodiraju.weebly.com/uploads/1/3/4/6/134678535/mulesedek.pdfIn PDF document text
    • http://mopexaxurip.getenjoyment.net/diablo_3_monk_speed_build_season_21.pdfIn PDF document text
    • http://suzamakulamuj.mypressonline.com/zebofetukarakoripoxevoda.pdfIn PDF document text
    • http://nigodofifulo.scienceontheweb.net/59376476067.pdfIn PDF document text
    • http://sufawevugut.mywebcommunity.org/tourism_marketing_manager_salary_in_south_africa.pdfIn PDF document text
    • http://wivevadevenumet.mywebcommunity.org/arrl_antenna_book_download.pdfIn PDF document text
    • http://lovupijuti.getenjoyment.net/how_to_contact_planet_fitness_corporate.pdfIn PDF document text
    • http://fadewujetenuve.mywebcommunity.org/jivorulapeledixipag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6c639bf1-704a-4500-b661-329758898742.filesusr.com/ugd/02d620_8e8a6dab918247ecbfd97b2bd10259e9.pdf?index=trueIn PDF document text
    • http://sinusisokopex.atwebpages.com/pegekaxag.pdfIn PDF document text
    • https://30f21d72-2b41-4965-a7bc-2abb02bf1ded.filesusr.com/ugd/47e66e_34e70b4dd149424abcf10231b76a60c6.pdf?index=trueIn PDF document text
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_552996f240884546b88856d2fcc09dd5.pdf?index=trueIn PDF document text
    • https://acfc0e76-311d-46af-9c13-f46c112eb424.filesusr.com/ugd/f90bad_f7943a0a16454c9c9661dba8e2eb229e.pdf?index=trueIn PDF document text
    • http://muvemaxadal.onlinewebshop.net/agro_ecological_zones_in_sri_lanka.pdfIn PDF document text
    • https://0ef2f354-78a3-4528-990c-72f69c86fc6a.filesusr.com/ugd/6a0da6_af0c20416e2e4bfab5e9bc5752957bab.pdf?index=trueIn PDF document text
    • https://7fc1e5b2-1dd8-4457-9de2-3dea1ab9f589.filesusr.com/ugd/fedd61_a0107332fad44211bf8ba3ee02756ad6.pdf?index=trueIn PDF document text
    • https://96a9e3af-f0c3-4048-9e6c-0ad8da3c6018.filesusr.com/ugd/15d534_096228f316ea4d3aa7681fc101c1461c.pdf?index=trueIn PDF document text
    • https://5c2cca0d-3a4e-48b0-93bf-8ac6c0c026cb.filesusr.com/ugd/271e65_72a933777ce24e04bef3790274c528e2.pdf?index=trueIn PDF document text
    • https://2f8a6ab9-e864-4757-b083-6627a13f4c48.filesusr.com/ugd/405339_6e3cbba755c64203a8f4abf04d4e18a2.pdf?index=trueIn PDF document text
    • https://d4bcd744-2348-4fe3-9006-05b2fcbd3cbd.filesusr.com/ugd/704566_cfcc8e9fe83440c09be4426362a5f9a4.pdf?index=trueIn PDF document text
    • https://39ad70c8-6a03-4de2-a89b-b0209cba5754.filesusr.com/ugd/d2759c_db111b1efe374456ab61eb34bcc050a7.pdf?index=trueIn PDF document text
    • https://7f06b679-e14d-4525-8955-d56a7cf6f710.filesusr.com/ugd/79e5df_e862de2c2f7c49a79b5aa39b3761e866.pdf?index=trueIn PDF document text
    • https://6525eaf8-9a42-4119-9fb4-c3d475b3b78e.filesusr.com/ugd/80bfa9_3c3391486b2e406baf4038662c9147a4.pdf?index=trueIn PDF document text
    • https://17673d3b-e5d0-4e0e-8211-f079fadf35f5.filesusr.com/ugd/13ae68_c06c456bf36344ebbd6cb122fa4205de.pdf?index=trueIn PDF document text
    • http://neloralo.myartsonline.com/25934275499.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF56 5180 bytes
SHA-256: 800bc9c088cb86311573fa2df7e04cfa37ff3d6c7c4a3328088315f6d916c294
font_01_sfnt_off000100e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E8 10932 bytes
SHA-256: df7fe2a6a588f89aa00b3a4bcb3f3ce97cefd24bc301f79b90a1e3bb7221f5b2

Open this report in the interactive analyzer, or submit your own file for analysis.