Malicious PDF — malware analysis report

Static analysis result for SHA-256 104c5abcc2d17c7c…

MALICIOUS

PDF

109.2 KB Created: 2021-03-17 11:11:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 263a3a230683e3f62636f4b6d656bc18 SHA-1: 2ef2fa95f24f4a41d5cf800d7c66ee3941800bce SHA-256: 104c5abcc2d17c7cedd01ad0d38487832f39e6077e5ff4c85e63ad9270605cd2
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged this PDF with a high probability of being malicious. The presence of multiple links on disposable hosting further supports a malicious intent, likely to lure users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://crophysi.ru/wix?keyword=d%2526d+5e+bugbear+race+stats In PDF document text
    • https://cdn-cms.f-static.net/uploads/4454419/normal_603a20ad2f681.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490724/normal_5fdb2545ac568.pdfIn PDF document text
    • http://vetobiz.sportsontheweb.net/tevezodonos.pdfIn PDF document text
    • http://selozufuwadapuw.66ghz.com/94306890489.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/c8PsNZP/nuniguledefilobivu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487935/normal_6008d21144e14.pdfIn PDF document text
    • http://jekeluxuto.mywebcommunity.org/65160822517.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502833/normal_604bbaf9831d4.pdfIn PDF document text
    • https://cdn.sqhk.co/fosojatesog/Mgie5if/mission_igi_free_shooting_games_fps_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394082/normal_604b922e615b3.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/20133167765.pdfIn PDF document text
    • https://cdn.sqhk.co/xoraxuvonaf/cgTieIW/80021802726.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvetuzaxi/phihihh/pufeta.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502268/normal_5fc79f7ddb3dc.pdfIn PDF document text
    • http://zupedaganivo.66ghz.com/41167233756.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wawuzir.epizy.com/zatoxaxibifu.pdfIn PDF document text
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_dede1630da19479899fefe7cc71d35cb.pdf?index=trueIn PDF document text
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_fbee1bca3f524040adb84d5e0bda6205.pdf?index=trueIn PDF document text
    • https://1d812fcc-cfc3-4558-a870-56fc5b7f4c2e.filesusr.com/ugd/754d94_1eca295298d542f396159d75a0426765.pdf?index=trueIn PDF document text
    • https://7e073981-ad1c-4081-8dc0-76946ba36063.filesusr.com/ugd/c4f63d_37fac47ed67d4b479450c53f4c302f89.pdf?index=trueIn PDF document text
    • https://f6142301-0c02-44dd-b2c5-62cf9b3cd0dc.filesusr.com/ugd/ebfdba_a92ab6226916424589bac411b53ffbcb.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off000193e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x193E1 6504 bytes
SHA-256: b05d02c61ea01b887f89ffee6a8a3c7da1c826af5b3e3bcae1cf332f790618e7
font_00_sfnt_off000108ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FF 7516 bytes
SHA-256: 03de04004cdd807ea9c269500cd56b06efda50ff8db7b95da1d31ce30d174ec3
font_01_sfnt_off00011c84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C84 3148 bytes
SHA-256: b72324bf9fb2f960ad531a0c7fe13c100795e1c8b461db9e4f4d6c8496002b7d
font_02_sfnt_off000127c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C3 4156 bytes
SHA-256: d9d9eb8b5a67a8494ca5a9593d54773c41ba913a17cb426b52e0a193c0b11448
font_03_sfnt_off000135b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135B1 6280 bytes
SHA-256: f19737e7ae504a93f2c40ebdcb093e324ed3d787609e781d4a33af58a066a9a7
font_04_sfnt_off0001451c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1451C 19336 bytes
SHA-256: dd7ede998ff6cb661a61731ca737cf40ecb33c3855c44c1a57517dc4376fa0be
font_05_sfnt_off00017d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D42 16516 bytes
SHA-256: cc4c4ec8ef66948cd3398a61336ca181b0064ec2239a21c36315eb1cf1e4a431

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