Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1a01a57c49f4b9a…

MALICIOUS

PDF

84.0 KB Created: 2021-09-23 03:25:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 1c1ba0252b0e29045d96b0d86cd6c141 SHA-1: a6144eb4765f1d2eccedf7b422f417b7952acca8 SHA-256: a1a01a57c49f4b9a124bddd6a39c6d85323c35f9d80340bc8127f790cfdeed52
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 0.9955

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://archism.ru/uplcv?utm_term=famous+english+short+stories+free+download+pdf+for+children%27s PDF link annotation
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/monifefizasom.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/76055205753.pdfIn PDF document text
    • https://tenekedjieva.com/uploads/file/17809015343.pdfIn PDF document text
    • https://hamzsabegi60szallo.hu/UserFiles/File/lokodiwogegazoxidewib.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/41995270696.pdfIn PDF document text
    • https://billionbosses.com/ckfinder/userfiles/files/8606385427.pdfIn PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/54586634904.pdfIn PDF document text
    • http://postelezmasivu-olomouc.cz/ckfinder/userfiles/files/97686110581.pdfIn PDF document text
    • https://jyapa.com/jhuoyue/uploadfiles/kosar.pdfIn PDF document text
    • http://mapect.com/upload/fckeditor/file/fegata.pdfIn PDF document text
    • http://efrex.cz/files/file/jojowetu.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/56866503448.pdfIn PDF document text
    • http://juncheng.tw/upload/files/gutafobebobemovat.pdfIn PDF document text
    • http://wingtsunkungfu.ro/imagini_ws/zakomisufazun.pdfIn PDF document text
    • http://demirlermetal.com/resimler/files/rewotubufe.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/33556592037.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/2021913348149255.pdfIn PDF document text
    • http://cec-intl.ru/app/webroot/files/file/3743358605.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/80749353467.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/8849e90af71d920176852939b3cced49/47557772506.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/47426281092.pdfIn PDF document text
    • https://dom-titan.rs/files/bevibavunewitevevevavovo.pdfIn PDF document text
    • http://toroisg.com/public/images/files/97827539662.pdfIn PDF document text
    • http://pro.ovh.net/~tribuene/images/banque/file/wigodabipa.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA03 11264 bytes
SHA-256: 433b2b586bef4974f3d136febed79eb6f1683cf8be4c167ef21fcafdd458e3bf
font_02_sfnt_off0001141f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141F 17872 bytes
SHA-256: d07efab7cc1f5b232c382eb1c8f5b88dd5ee97b5f0ac198886546593184e5640

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