Malicious PDF — malware analysis report

Static analysis result for SHA-256 89ace17a62fb08df…

MALICIOUS

PDF

79.3 KB Created: 2021-04-15 18:52:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5ce801daa9b6676adc5c24318c6b042e SHA-1: 531989106416db1e64c7fae556b43ddb22010d1a SHA-256: 89ace17a62fb08df19b3675a1d9a63fbfb2e428603a7100d860239565a45a82f
126 Risk Score

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 0.9994

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://xajibur.ru/strik?utm_term=the+love+song+of+j.+alfred+prufrock+meaning PDF link annotation
    • http://memaberenux.scienceontheweb.net/7606773319.pdfIn PDF document text
    • http://jeseselanus.scienceontheweb.net/tubiraruvediza.pdfIn PDF document text
    • https://xanalefude.weebly.com/uploads/1/3/1/4/131411596/lazatemojunerituri.pdfIn PDF document text
    • http://xidufekaposepun.iblogger.org/bsc_nursing_entrance_exam_previous_year_question_papers.pdfIn PDF document text
    • https://botefajom.weebly.com/uploads/1/3/4/6/134690565/788811.pdfIn PDF document text
    • http://feremujidonigu.getenjoyment.net/pofagewubonu.pdfIn PDF document text
    • https://tawugeri.weebly.com/uploads/1/3/4/7/134774142/vobalo.pdfIn PDF document text
    • https://xinuluparos.weebly.com/uploads/1/3/0/9/130969110/024ef968817c9fb.pdfIn PDF document text
    • http://watomidipokaki.22web.org/what_is_framework_in_qualitative_research.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bixerexexotepe.rf.gd/84409904594.pdfIn PDF document text
    • http://fosadexovoz.epizy.com/mdr_zx770bn_review.pdfIn PDF document text
    • http://gapexod.rf.gd/4730733160.pdfIn PDF document text
    • http://limepupotof.epizy.com/30554305703.pdfIn PDF document text
    • http://bitujiduruv.myartsonline.com/87743815189.pdfIn PDF document text
    • https://aa4c2489-c93b-4667-afab-104bf5323bad.filesusr.com/ugd/8b49c6_1252a0ddd5a04c45a977e5b506d26116.pdf?index=trueIn PDF document text
    • http://fuxuxasezid.atwebpages.com/3861654112.pdfIn PDF document text
    • https://0633afab-057d-4448-85e1-ac1a97571725.filesusr.com/ugd/66920c_5ebac8ec58a5467d94c6176c186fa85b.pdf?index=trueIn PDF document text
    • https://790985df-dfec-4a08-b509-00f37668cf87.filesusr.com/ugd/a421e3_1c6033ab2d514459a2020f4c1a035746.pdf?index=trueIn PDF document text
    • http://xajulazozu.epizy.com/wondershare_filmora_filehippo.pdfIn PDF document text
    • http://farilofisimoru.rf.gd/83804852355.pdfIn PDF document text
    • http://xofifozanexez.epizy.com/tikezenaba.pdfIn PDF document text
    • http://kibowetesuve.rf.gd/bwintv_net_bbs_register_form_update.pdfIn PDF document text
    • http://bexiponezewan.rf.gd/10943253011.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_off0000f82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82D 5748 bytes
SHA-256: a8e08291f073c82fdf846399e2349845c5077339c58098ffaffc5cef1e2c514f
font_01_sfnt_off00010bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAE 10508 bytes
SHA-256: 39f4e62109073cd20f659713385f2dc39ec77c21e6958738765e9692d44f5011

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