Malicious PDF — malware analysis report

Static analysis result for SHA-256 18e0be1639a78d77…

MALICIOUS

PDF

103.9 KB Created: 2021-03-19 08:52:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 286ea5a3eb442e5e2541c5160efb0fff SHA-1: 532634128650afaa599105783d1a5ae800c03567 SHA-256: 18e0be1639a78d770b42a332529c744668d645f153c6473fcb40d1d2fa8fbb1f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, and includes a URL with a search term suggesting a lure for game-related downloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 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.
  • 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://vilenefex.ru/123?utm_term=ark+survival+evolved+apk+obb+highly+compressed PDF link annotation
    • http://nashremont.site/jivukutulomakazewazes2as4.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/how_to_use_igora_vibrance_0-00.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/fda_seafood_haccp_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/pixifazovibezanijevuxu.pdfIn PDF document text
    • http://suzaxikuzexaw.66ghz.com/jumowomavasele.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/nivore.pdfIn PDF document text
    • http://snail-case.store/549519906gnayc.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/kenixosokikofisupi.pdfIn PDF document text
    • http://electriccannoz.club/juzapirojukitobirujeberfkpky.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/4088a8a9-cf48-4777-b97e-9c0d35169d05/sozovuz.pdfIn PDF document text
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_daea579e322844ceb84393b789be678e.pdf?index=trueIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_94687229eca04775b14bf6910ea4fab0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3380805-c0ea-439d-89a3-ebdaaa1eec6c/danby_dehumidifier_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5c04475-faf2-402a-958d-3362a8f0816b/how_to_program_chamberlain_clicker_to_genie_garage_door_opener.pdfIn PDF document text
    • http://zinezalidoratov.rf.gd/nie_boska_komedia_streszczenie_szczegowe.pdfIn PDF document text
    • http://pigibotokaper.epizy.com/rodonararesixosesifafim.pdfIn PDF document text
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_719fef1fc07245c1b387abce8bfa2c85.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cf3f4da-66c2-402f-a084-3a0155b4de46/howls_moving_castle_book_wikia.pdfIn PDF document text
    • http://guxozuzemonixe.epizy.com/malozapab.pdfIn PDF document text
    • http://fopagozijudiri.epizy.com/gambar_animasi_bergerak_islami.pdfIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_42ca194d21ea4ddab8e9883e9fd1c696.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4d4cf7e-f64e-4b4f-a281-d4bcf7eb6ee9/melhores_cursos_de_ingles_avanado_online_gratis.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
    • 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://www.gnu.org/licenses/gpl.htmlIn 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D4 6676 bytes
SHA-256: c771749ac430df80d980b7b547ce8d3855b3538cef4b0649cf9476a0c216e958
font_01_sfnt_off00010aa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA7 5844 bytes
SHA-256: 3d9cecd7577736c35dc74a9b87c0fb1382c2e90dfbcde7ebce15aaef75f891c5
font_02_sfnt_off00011e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E66 11196 bytes
SHA-256: 7a0618f59c4e0820462755cd5dcaf90e3b5e97f55ecc1e94679e6dab1891fc34
font_03_sfnt_off000140e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140E2 5852 bytes
SHA-256: 0460e4b819836684ee646564f23d3767bfcf5407a742f126e14b557faf704447
font_04_sfnt_off00014f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F99 12640 bytes
SHA-256: d00c6dd4991c2010ce628c4734e7acf3497c62318b8e3749e402d5dcf9b740a4
font_05_sfnt_off000178c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178C2 16880 bytes
SHA-256: f5abbb234cbdc06cba8d791f4336b5c18fd773ed2db701b53bdcf8d35c283baf

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