Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a0527d2130c02f6…

MALICIOUS

PDF

78.1 KB Created: 2021-05-07 20:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4f880b69587b457286bd678a526316f2 SHA-1: d8e87f488454f1f16e1a24f06b5fc7af582ae640 SHA-256: 0a0527d2130c02f692e3dbed4c1d56b0d9af930d3837de77dc88b757d5a5671f
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://botokaw.ru/strik?utm_term=orion+cooker+recipes+turkey PDF link annotation
    • https://lejumapufa.weebly.com/uploads/1/3/4/6/134688193/15c1e2d476.pdfIn PDF document text
    • https://furimulu.weebly.com/uploads/1/3/1/4/131411024/moziwosutawif_todabup_sijedituseve.pdfIn PDF document text
    • https://xoxudepibedewem.weebly.com/uploads/1/3/5/3/135317482/fcffe1e656.pdfIn PDF document text
    • http://fakutuzogazu.sportsontheweb.net/mother_goose_english_nursery_rhymes.pdfIn PDF document text
    • https://dexidete.weebly.com/uploads/1/3/5/3/135394420/eda18e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382619/normal_6065f8c797746.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368503/normal_6050b8d1da92c.pdfIn PDF document text
    • http://bufaturofonoko.22web.org/bhojpuri_movie_video_hd_2017.pdfIn PDF document text
    • https://rotarivinevi.weebly.com/uploads/1/3/4/5/134599250/pemoji-mekinusulur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420449/normal_5ff3c85f21031.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468572/normal_5feb864cdbab4.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/hbibhgc/87528995614.pdfIn PDF document text
    • http://ziwusis.getenjoyment.net/c._s_lewis_the_four_loves.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366057/normal_5fe1685991da5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459921/normal_5fe4ac9e3cd3f.pdfIn PDF document text
    • http://bewilotaweje.mywebcommunity.org/51332773321.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470523/normal_6031009f59c0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452588/normal_606dd2a3015fb.pdfIn PDF document text
    • https://cdn.sqhk.co/niramojiga/Jjd73m7/ziziguwuramed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tapoloferazuziw.atwebpages.com/24168146550.pdfIn PDF document text
    • http://favuzokusom.rf.gd/alternating_current_basics.pdfIn PDF document text
    • http://fukorow.epizy.com/suvedagalag.pdfIn PDF document text
    • http://wozetarep.rf.gd/92506380516.pdfIn PDF document text
    • http://felawikemuda.epizy.com/36756788163.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_off0000f612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF612 4880 bytes
SHA-256: 358f22f033ccdf7d4b1eba17b1ba121218cb78833b44121d2f5002ac12b648b2
font_01_sfnt_off000106c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C8 10548 bytes
SHA-256: f5c1dc318dcb30dabcc8b8e5a6b013c0a52f7484e5008bc5359160ba5b70db1a

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