Malicious PDF — malware analysis report

Static analysis result for SHA-256 44df48ca6bf2b704…

MALICIOUS

PDF

96.4 KB Created: 2021-03-06 17:07:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: b749a1f3685d360c50834027f4d9ff18 SHA-1: 0d832c5f99e42617c4afe2ce8167fb91e86ded6c SHA-256: 44df48ca6bf2b70478fc97fe395de21c8986c65989341be3ea12ab8cfdba7ca9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, including one pointing to 'resalured.ru' which is flagged as a potential phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to 'Etapas del aprendizaje basado en proyectos pdf', suggesting a lure to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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/award?keyword=etapas+del+aprendizaje+basado+en+proyectos+pdf PDF link annotation
    • http://intekzafast.online/animal_crossing_pocket_camp_mod_apk_2019f31pj.pdfIn PDF document text
    • https://cdn.sqhk.co/kakapoxavu/jaigwmv/mini_golf_cartersville_ga.pdfIn PDF document text
    • http://sy0n.icu/9939454235588ezx.pdfIn PDF document text
    • http://vittorguxx.site/15638239214lmigh.pdfIn PDF document text
    • https://cdn.sqhk.co/falugojafat/gfkKLja/strikemaster_battle_bibs_review.pdfIn PDF document text
    • http://ijmalan.xyz/causas_y_consecuencias_del_cambio_climatico3ufix.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/how_much_sodium_in_taco_bell_crunchwrap_supremem0913.pdfIn PDF document text
    • http://clobuss.ru/gaston_armando_gonzalez_bejarano_paiij46f.pdfIn PDF document text
    • http://pumuwofonukel.22web.org/why_does_my_panasonic_phone_say_line_in_use.pdfIn PDF document text
    • http://copyright-security-ig.com/boostnote_markdown_guidejtc05.pdfIn PDF document text
    • http://instofficial.online/how_to_train_your_dragon_3_toothless_girlfriendfohkd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://72dfff08-f6cb-4f5d-aaac-ebe71175d6a6.filesusr.com/ugd/c268f7_f593e102762c4ed6a0339e07728b1436.pdf?index=trueIn PDF document text
    • http://guduxakif.rf.gd/emulator_nes_android_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33daa7cc-e437-4053-9dd1-4d5b4dcec2a3/what_does_ocap_mean_on_my_spectrum_cable_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87b1c16e-8d34-40f5-8c03-2dbcff7452f2/21584414132.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/868d0dc5-4027-4cd0-8f19-1ac2751bf388/industrial_revolution_impact_on_graphic_design.pdfIn PDF document text
    • https://1bf92926-22d0-44a1-94fb-b51843c41cd5.filesusr.com/ugd/762c1a_4930dc4c90b6491a90abb10f46ee6bf3.pdf?index=trueIn PDF document text
    • https://6f12065f-c45d-410c-b048-6ec23fb2b810.filesusr.com/ugd/02ccf7_198edf8fab9440e5a2241f678158bc2b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/47bc553a-5274-4320-beca-9570f79c15ce/xekewanewekozu.pdfIn PDF document text
    • http://pisolakolas.epizy.com/5537566718.pdfIn PDF document text
    • https://968bac2e-1409-45a7-bd11-2c37eba47390.filesusr.com/ugd/c81504_c0711e87691e4875b4529ab4c8bf6997.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ACE 5476 bytes
SHA-256: 1a2e25e356bb6956e67791447d43c5fcb5d757cadf16f6a19d8fa3a8c8a490d6
font_01_sfnt_off00014d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D90 11704 bytes
SHA-256: c283216004990f5185fefb3357809fc51c81f6aa8ee01d667bf20fb35e80324a

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