Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3adbbf0f54f26e9…

MALICIOUS

PDF

68.0 KB Created: 2021-04-05 15:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 17944ba83d958d93656c3e86b31fc7fb SHA-1: b9bf6724c11cd6e361b9eaaf4ba517df641583e4 SHA-256: e3adbbf0f54f26e93426309693ccdc660652559a36597a8583f26148da7ff980
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least two pointing to potentially malicious or link-farm domains. The document body, though partially obfuscated, suggests a lure related to 'classroom objects in french pdf' to entice users to click on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://druttle.ru/award?keyword=classroom+objects+in+french+pdf PDF link annotation
    • http://lifeshop.pro/self_employment_lettersbnou.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420240/normal_5fe0c7efd8727.pdfIn PDF document text
    • http://getchambre.xyz/jagiravapu57a17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366366/normal_5fcefe12f31bb.pdfIn PDF document text
    • http://momarivido.mypressonline.com/zegomixijuvatewasupiro.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/60389620374.pdfIn PDF document text
    • http://prizinsta365.website/nate_the_great_and_the_stolen_base_freeb4jrg.pdfIn PDF document text
    • http://pigalimiru.medianewsonline.com/artemis_fowl_the_arctic_incident_graphic_novel_download.pdfIn PDF document text
    • http://kimiter.medianewsonline.com/caracteres_chinos_tradicionales.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5fa60de5-32ab-41ac-ba65-77330e21e623.filesusr.com/ugd/2e16aa_1c9f614512344d81abea197d7423b678.pdf?index=trueIn PDF document text
    • http://disoluje.myartsonline.com/22377661936.pdfIn PDF document text
    • https://e301b21f-f707-426c-a094-6199d4b1a2d6.filesusr.com/ugd/f65518_ad22b134fbd8478dbb68142ec3b762a1.pdf?index=trueIn PDF document text
    • http://mizetum.onlinewebshop.net/95214262225.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/815090ea-ce7d-44ad-9a34-bcb3052178ae/bobisesidejokow.pdfIn PDF document text
    • https://dcc20dec-0195-4543-b617-cfb82efd15f0.filesusr.com/ugd/30ea26_b56a0fa7a0b64c1eaf9689234bd80c46.pdf?index=trueIn PDF document text
    • https://db532842-334f-4efb-8993-e67ec8f20ff5.filesusr.com/ugd/bc5be3_4c275ef278f441bd963a450ca3b80357.pdf?index=trueIn PDF document text
    • https://8a7e94d2-1b07-4399-8a7b-cfebf1eb419e.filesusr.com/ugd/e78b77_de07a504ccaf448481e832c90ac0492b.pdf?index=trueIn PDF document text
    • http://lelikerakovet.atwebpages.com/2458519368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2561751b-d32d-46b0-8a95-2d8c75e9a900/declaracion_de_los_derechos_humanos_historia_resumida.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

Related samples 5

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE1 5516 bytes
SHA-256: d9267079b0f3660e3d682a2a9977584f399ac991805fe40a70efc14ed9ce7016
font_01_sfnt_off0000dd6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6F 10712 bytes
SHA-256: 1794d46686f1eb519191b8f3711592bb84499dfc1f03b27581272ea3583dfe9d

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