Malicious PDF — malware analysis report

Static analysis result for SHA-256 d71c661eeaae3784…

MALICIOUS

PDF

75.6 KB Created: 2021-04-30 17:36:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0f4ba7e4d47ed6ef0ecbcab7eff99a27 SHA-1: 582005388b8ee322f7155138d3d4d89adbd084b3 SHA-256: d71c661eeaae3784cea409487832fc06bdb17498534871de6c6e2828225a5eec
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 0.9992

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://gimoguvi.ru/strik?utm_term=diccionario+ingles+y+espanol+gratis PDF link annotation
    • http://tonojodozif.mypressonline.com/76742433769.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480758/normal_5fdf3e2fc9ba4.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/geometric_transformation_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443602/normal_6004bb42210a4.pdfIn PDF document text
    • http://milesnires.xyz/turn_off_screen_time_iphone_xhywp0.pdfIn PDF document text
    • http://worldhold.online/ncert_9th_class_science_book_solutions_chapter_573hy0.pdfIn PDF document text
    • http://zisezamerares.mygamesonline.org/38922831344.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/anderson_bridge_viva_questions.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/sufode.pdfIn PDF document text
    • http://gijebuk.iblogger.org/xenezawudo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386330/normal_5fc87221bae87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379231/normal_60308203ed9b8.pdfIn PDF document text
    • http://fexevewuli.mypressonline.com/cours_pour_apprendre_l_anglais.pdfIn PDF document text
    • http://devuweza.scienceontheweb.net/ruang_lingkup_akuntansi_manajemen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gepivefukusi.atwebpages.com/beryl_howell.pdfIn PDF document text
    • http://warejuratunu.rf.gd/pitch_book_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf71f696-55a7-4323-8731-a9091287eae3/qcy_qy8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/926ff6c0-22ad-499b-8710-7aa634e11874/what_is_the_52nd_amendment.pdfIn PDF document text
    • http://dowuvoduwitovos.atwebpages.com/tomemetarizixolej.pdfIn PDF document text
    • http://delozaroj.epizy.com/tarot_spread_for_love_advice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a148874f-d4e8-489d-b7ba-581d907a4dc2/sesagumomuxerebumotomenaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06ccea63-30da-4171-856a-2839c26c92cc/bogixuxuligimevowa.pdfIn PDF document text
    • http://kenumubozejofum.epizy.com/21915986134.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_off0000e30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30A 5204 bytes
SHA-256: 4b6903bbde1ae2ad39a04e6f5d4440ed74c4122554010e518201992ca84ec44e
font_01_sfnt_off0000f4df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DF 13640 bytes
SHA-256: 1b74cf1dff8c9559e39b8c0b2a9cd926b12173011d407d567613260a73752fa7

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