Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1b5a21ad46cfd9d…

MALICIOUS

PDF

97.5 KB Created: 2021-03-16 06:44:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e2dda51e4ec5f401331fb926873dcdd0 SHA-1: 786b2fcd42ca3b85d0eae4c1dac26fd67cd6b217 SHA-256: b1b5a21ad46cfd9ddc31bc1067e8664f62b917a4bc786990ba253b7aa341b6b4
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://resalured.ru/wix?keyword=introduction+to+programming+languages+chen+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412773/normal_604742e351855.pdfIn PDF document text
    • http://lifeit.pro/huawei_e5573_specificationijane.pdfIn PDF document text
    • http://50off.pro/963925183081r1lp.pdfIn PDF document text
    • http://rezltml.xyz/wunigarevopewelaxugufaguyqd5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451352/normal_5feb2d1d0eb16.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/android_os_latest_release.pdfIn PDF document text
    • http://copyright-helps-team.com/7817248677m2szd.pdfIn PDF document text
    • https://vominitaxa.weebly.com/uploads/1/3/4/6/134677623/e521a13590.pdfIn PDF document text
    • https://ruzutemeba.weebly.com/uploads/1/3/2/6/132681300/bamiwarudosifev_tisap_nulewesaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428033/normal_604dd8f53c859.pdfIn PDF document text
    • http://dontbeshy.xyz/eldritch_knight_5e_spells_guideewifk.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/64223108282.pdfIn PDF document text
    • https://mogisitubetaw.weebly.com/uploads/1/3/4/4/134496388/1287328.pdfIn PDF document text
    • https://peniseguj.weebly.com/uploads/1/3/2/7/132712198/zarugid.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/71336741543.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/21676137580.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_e19f66738b064d80b81fdbc48c16f833.pdf?index=trueIn PDF document text
    • https://734e8db3-b9db-457c-abaa-08c06218e7ae.filesusr.com/ugd/f6bb82_2340312a4e9249beaf6742c73018e62e.pdf?index=trueIn PDF document text
    • https://484a0fbd-04e0-416f-b335-41eb3f66808b.filesusr.com/ugd/228afb_9a4c7d5c75fe42a3abb1f0051f0b6a34.pdf?index=trueIn PDF document text
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_dc32e53c08044214b8fdc0396952173c.pdf?index=trueIn PDF document text
    • https://ec08fec6-e576-400d-8504-372613838d3c.filesusr.com/ugd/57e0ce_f564a1d248cc4e3d857c47f5dce09cd1.pdf?index=trueIn PDF document text
    • https://fac30f9c-1bc3-4ff6-ac40-7ced1d2a170b.filesusr.com/ugd/3b7182_af9424a6e2814d7eadd459eebe70d74f.pdf?index=trueIn PDF document text
    • https://8b8c7005-3af0-45a1-8e5b-a6902caa9335.filesusr.com/ugd/dbd7d9_89a7cb78dcbd4cc6bbb5c4c4dffa1053.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F6 4016 bytes
SHA-256: 7278ed2924031f7cb48accbee7c336b7b30468630b79de79cd3589013bd2d2c1
font_01_sfnt_off00012822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12822 5504 bytes
SHA-256: f85c35ec0d40494880c0f5374ba3bf14ad1b171f8a00a0fa967cb3adab279b40
font_02_sfnt_off00013aaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AAF 11612 bytes
SHA-256: 6887b291c07056ecab95a01130754271ff406afaf96bb11dd575b83daa0a70fe
font_03_sfnt_off000162b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162B7 16164 bytes
SHA-256: f469c5aa689aa4c1965481b78cfaebbf1c3ebdad2306c7067134b7b4aaa0addd