Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdaa96695a2d1e76…

MALICIOUS

PDF

73.0 KB Created: 2021-06-01 16:25:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 77067b60d61d06610ffe5c6f3c205303 SHA-1: 706f2c93e59d9537ce68c7b95f0ff2367c69acd6 SHA-256: cdaa96695a2d1e76647dafdb146774c410e4991b3cdf3da87ffc7220cbe031ae
186 Risk Score

Malware Insights

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

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 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://oniceh.ru/pbw?utm_term=bible+coloring+sheets+for+kindergarten PDF link annotation
    • https://ninibukakogim.weebly.com/uploads/1/3/2/8/132815385/zawuragikalogeg-jesiwumaz.pdfIn PDF document text
    • https://lemabifi.weebly.com/uploads/1/3/4/3/134319461/morabozawarebori.pdfIn PDF document text
    • https://wegogitizunivom.weebly.com/uploads/1/3/4/3/134369171/takaruwiv.pdfIn PDF document text
    • https://befadileniralan.weebly.com/uploads/1/3/6/0/136082268/xureliwapepirovebo.pdfIn PDF document text
    • https://tetafawewaze.weebly.com/uploads/1/3/4/3/134378669/094a8971f08.pdfIn PDF document text
    • https://xepuduwosijun.weebly.com/uploads/1/3/4/6/134634987/7138665.pdfIn PDF document text
    • https://kuratiwupojaxu.weebly.com/uploads/1/3/4/0/134017491/jamami_kuvakiwufoweso.pdfIn PDF document text
    • https://gupoxebexu.weebly.com/uploads/1/3/4/3/134337811/01a41486efb43.pdfIn PDF document text
    • https://sewimumox.weebly.com/uploads/1/3/4/6/134668968/7c4a1f5744a1.pdfIn PDF document text
    • https://matexofetuboso.weebly.com/uploads/1/3/1/4/131453592/a7fcf668.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tusawijer.pbworks.com/w/file/fetch/144443658/papas_pizzeria_swf_download.pdfIn PDF document text
    • http://tusawijer.pbworks.com/f/simple_interest_and_compound_interest_worksheet_doc.pdfIn PDF document text
    • http://kiletejude.pbworks.com/w/file/fetch/144411687/64175934196.pdfIn PDF document text
    • http://mumubib.pbworks.com/f/14485633926.pdfIn PDF document text
    • http://mizunebapod.pbworks.com/w/file/fetch/144455241/mujenajifofixolemalatowe.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/f/kanovibebijave.pdfIn PDF document text
    • http://ridelox.pbworks.com/f/materi_akuntansi_keuangan_kelas_xii_smk.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/w/file/fetch/144412404/kaletajoruduwaxotekego.pdfIn PDF document text
    • http://lugozamuxika.pbworks.com/f/18780186917.pdfIn PDF document text
    • http://sofutikajen.pbworks.com/w/file/fetch/144455598/how_to_put_reference_on_capitec_app.pdfIn PDF document text
    • http://pokatufaxi.pbworks.com/w/file/fetch/144421107/subozutusojaxus.pdfIn PDF document text
    • http://giwupiraride.pbworks.com/f/surface_4_price_canada.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_off0000dd9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9B 5536 bytes
SHA-256: 95372b9a89befe64f9a61fd889a1d7445bf5fccff17fa29105ca55754efb73f7
font_01_sfnt_off0000f067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF067 11208 bytes
SHA-256: e96d79eae5ca49e6b49b2d36ba6407d53d88535c78334f587565c21e8d56048f

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