Malicious PDF — malware analysis report

Static analysis result for SHA-256 44cf24081e1d11e9…

MALICIOUS

PDF

90.5 KB Created: 2021-03-14 14:27:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5e6d18a3690186cbb3fa70963e0a22a3 SHA-1: efa170d40fa2d7f8c979526791eef9bdabc2feeb SHA-256: 44cf24081e1d11e9619ac4696c7ceb2e2f3ce8fcb0595a2b8b50ceb7297a10bb
252 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and contains numerous links to external PDFs hosted on disposable domains. Several URLs point to known malicious redirectors or link farms, suggesting a phishing or SEO spam campaign. The presence of a 'download button' lure further supports a malicious intent to trick users into clicking links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=panda+pop+cheats+2020 In PDF document text
    • http://normaa-id.com/dapple_metallic_effectqbyo4.pdfIn PDF document text
    • http://bupetud.xyz/fish_mate_f14_automatic_aquarium_feederyqrm5.pdfIn PDF document text
    • http://sweetygirl.club/zifesonolezuvawudajoximub5djtr.pdfIn PDF document text
    • http://trokot-newshop.online/nj_transit_bus_freehold_to_nycc4bnh.pdfIn PDF document text
    • http://legionmone.xyz/formato_certificado_medico_escolar_para_imprimir_sep5m4kt.pdfIn PDF document text
    • http://noverst.xyz/there_is_there_are_worksheets_eslxmyeo.pdfIn PDF document text
    • http://grenkasalo4.xyz/71282095309l5d0s.pdfIn PDF document text
    • http://mgacessoria.online/first_aid_kit_band_illnessb7a2m.pdfIn PDF document text
    • http://femetorisufi.sportsontheweb.net/wadoxozexado.pdfIn PDF document text
    • http://gepopusoka.mypressonline.com/xetudidukiwop.pdfIn PDF document text
    • http://static-get.top/car_raffles_in_californiaoaz43.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://2ffa788b-df2f-461f-b9c5-573bec542745.filesusr.com/ugd/374ce0_281314babee44d94b74fc6a9938fd677.pdf?index=trueIn PDF document text
    • https://bd15da75-ee01-4ad3-8b22-4778d9929f37.filesusr.com/ugd/1abc29_2edc7d915e3d4ef6a034d75b72b26b9b.pdf?index=trueIn PDF document text
    • http://mezureda.rf.gd/agriculture_gk_download.pdfIn PDF document text
    • http://romutipi.rf.gd/who_assesses_the_safety_hazards_in_the_workplace.pdfIn PDF document text
    • https://5b2b9875-3923-4577-9ef6-0527498c95e7.filesusr.com/ugd/4e6dd5_d17d902dc4dd43d982f3766889c0cb0d.pdf?index=trueIn PDF document text
    • http://wanudoxemix.epizy.com/carte_du_monde_deco_grand_format.pdfIn PDF document text
    • http://xajokaxakubif.rf.gd/64346246701.pdfIn PDF document text
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_9d481419fcbb4f7e8ac0af86f10326ea.pdf?index=trueIn PDF document text
    • https://9f503c4c-bf14-4dcb-9a7a-68e0e5bb3568.filesusr.com/ugd/8ac1ab_a88d6070e0744ee4a771862e1ba64d91.pdf?index=trueIn PDF document text
    • http://negavutagogo.epizy.com/65434981486.pdfIn PDF document text
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_4486f31de59a413e8995e0afee040ea4.pdf?index=trueIn PDF document text
    • https://cfae799c-d04a-4395-b2c2-700dffd2ed5c.filesusr.com/ugd/15504a_15507d6c763e4ecbb2c21d6395b442e3.pdf?index=trueIn PDF document text
    • https://c948e902-2437-43f3-9f1e-7aaad30688a7.filesusr.com/ugd/464a75_f36d2bbea11347ddaa7274218b9a3590.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EA 5048 bytes
SHA-256: 845ef245f7e2e4dfcfcc703d4ee994741fb813bde6c4ae908556e947189e76b4
font_01_sfnt_off000107f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F7 1852 bytes
SHA-256: 07ecde503da4517b8f20e35e4c6cab051d84b79abe310f3c2ada97187e7d04e7
font_02_sfnt_off000110e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E9 11508 bytes
SHA-256: d7851a47aa5e908d4d1b0cc848802f84e43c8a48882064df2ca942039bebfa4d
font_03_sfnt_off00013843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13843 16268 bytes
SHA-256: 76d044abe4d13ecfdf5f08ba1986716ffce6e139973845599523167d26cafd4a
font_04_sfnt_off00014da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DA9 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3