Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f51e94fc11050a…

MALICIOUS

PDF

74.5 KB Created: 2021-03-14 08:00:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2dbdbc92f6a413b8cb4f5a6eb45b0e0c SHA-1: b016a50208c5fc306433ab9b6df62558f79b2194 SHA-256: d6f51e94fc11050a7741a7c022ab19dab923cb398dbea7e8b3177e331f63d06a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/strik?utm_term=2010+sentra+maintenance+schedule PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385436/normal_5fffbc2b74335.pdfIn PDF document text
    • http://rosebip.22web.org/rufodizatamogelojanejajab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378834/normal_60217d4b248b8.pdfIn PDF document text
    • http://xefawojuj.mygamesonline.org/70271017473.pdfIn PDF document text
    • http://ionatr.space/gupodorudujinald3zav.pdfIn PDF document text
    • http://magic-spring.com/80077837517r0w5u.pdfIn PDF document text
    • http://vkrowl.com/39135020969ec7l.pdfIn PDF document text
    • http://dalidusiz.mywebcommunity.org/which_companies_hire_data_analysts.pdfIn PDF document text
    • http://kazexajisodibu.medianewsonline.com/graphic_designer_job_indeed_pampanga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gogonof/aio_er_similar_apps.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/8664948152.pdfIn PDF document text
    • http://mowigefugitixa.epizy.com/altered_carbon_resleeved_cast_japanese.pdfIn PDF document text
    • http://mawugosujutesag.epizy.com/79373313621.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/99026086597.pdfIn PDF document text
    • http://ligiwekuxote.myartsonline.com/nuevas_tecnologias_de_la_informacion.pdfIn PDF document text
    • http://musubimiwudu.rf.gd/barking_up_the_wrong_tree_by_eric_barker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df6e7f4f-af0d-4751-90fc-7580669becd8/communion_whitley_strieber_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b620214-cf31-4933-8702-914fef6546c6/duvebukutogawerelemiveja.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A1 5412 bytes
SHA-256: a62934e3a203950c82c87f801e88e228b2b10877f97dd3994d94e8ab55e7599c
font_01_sfnt_off0000f8d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D7 10472 bytes
SHA-256: 7d33301a7d5f62ddf1c6d0f10ee261069530ae885dadf792e9d70952991d34dc

Open this report in the interactive analyzer, or submit your own file for analysis.