Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bc1e1d1555e6aee…

MALICIOUS

PDF

81.0 KB Created: 2021-03-27 23:22:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 549b1a607b1e7ef42fe7fafe8e95847a SHA-1: ed2f3ec319bdbfc90522e21b2c5fdc45531015fc SHA-256: 4bc1e1d1555e6aee47c45497084b2249067c30c9ffb475af629ad4d3a18fe8c6
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, identified as a link farm. The ClamAV detection and ML classifier strongly indicate maliciousness, with the links likely serving as a distribution point for further malicious content or phishing attempts. No scripts were extracted, but the PDF structure itself is used to facilitate the malicious linking.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/award?keyword=printable+calligraphy+practice+worksheets+pdf PDF link annotation
    • https://xezamojukugenu.weebly.com/uploads/1/3/5/3/135316948/4e6912eff2534f.pdfIn PDF document text
    • https://jomokojexenubi.weebly.com/uploads/1/3/4/8/134877089/ac7d13d6adb9a2.pdfIn PDF document text
    • http://itwomen.space/gasedajazu68x1h.pdfIn PDF document text
    • http://logoped-samara.ru/86325374286zwwyg.pdfIn PDF document text
    • https://bunavomotuta.weebly.com/uploads/1/3/4/6/134606544/7938017.pdfIn PDF document text
    • https://fujelaxu.weebly.com/uploads/1/3/4/7/134704358/jinalijodekomo.pdfIn PDF document text
    • http://xovebud.mygamesonline.org/26363065599.pdfIn PDF document text
    • http://itanto.space/mods_for_minecraft_ps4_freetwsrc.pdfIn PDF document text
    • https://cdn.sqhk.co/xuruwivagezu/hahi6MG/aadhar_card_correction_form_fill_up.pdfIn PDF document text
    • https://wofofubuw.weebly.com/uploads/1/3/2/7/132710679/8184236.pdfIn PDF document text
    • http://lajafago.medianewsonline.com/gixew.pdfIn PDF document text
    • http://cyberlife.store/resume_format_for_msc_biotechnology_freshersnec8v.pdfIn PDF document text
    • https://tigidejuremu.weebly.com/uploads/1/3/4/5/134502839/moligi-dagevosu-jatoz-kosepewinuf.pdfIn PDF document text
    • https://latavulepa.weebly.com/uploads/1/3/4/4/134461708/ripemipanada.pdfIn PDF document text
    • https://kidamevu.weebly.com/uploads/1/3/1/4/131437276/7757930.pdfIn PDF document text
    • https://jowidirususonin.weebly.com/uploads/1/3/0/7/130775515/fodude_gukidezomenad.pdfIn PDF document text
    • http://shoop-ff.ru/763257833809vtpm.pdfIn PDF document text
    • https://cdn.sqhk.co/kulamogo/gigjbjb/bismillah_khan_shehnai_free.pdfIn PDF document text
    • https://cdn.sqhk.co/kavonalitego/hidjaq7/93553109646.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mejumobax.atwebpages.com/96755155018.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D2 5816 bytes
SHA-256: ba1eff6e223ec191dd9978bc63ac2308c0bb9e8acbdccfe40b3679214f4062bc
font_01_sfnt_off0000f9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A9 11348 bytes
SHA-256: 2891518837b15abfcd42757bc4ac03932e506a2abac563b0aea216c3fd0219f4
font_02_sfnt_off00012090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12090 16192 bytes
SHA-256: 796abb589046a6794b20638b8f3d5374798c86db7bc0cccf3f694680d91a7597