Malicious PDF — malware analysis report

Static analysis result for SHA-256 2897ffe948ce115a…

MALICIOUS

PDF

79.4 KB Created: 2021-09-09 20:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: c8218d31db6a381e5b9a1dc8f22c52a9 SHA-1: df307a06a6ed7a9ac806bff8df6c1f9276767ba7 SHA-256: 2897ffe948ce115a54102c0b125ac50d4679a26942c178274f79a139393d9443
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious websites for phishing purposes. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. The presence of JavaScript points to its use in executing malicious actions within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ketchas.ru/uplcv?utm_term=how+to+use+astro+file+manager PDF link annotation
    • https://padservhosting.com/userfiles/file/vefevuxizizemitigav.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210907064406_d4g0et.pdfIn PDF document text
    • http://e-hematologica.pl/users/file/kalatidisiwigel.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/tabepibisurujoxizavoze.pdfIn PDF document text
    • http://jumpinfit.it/userfiles/files/69200122889.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/2021921915306484.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///18544312430.pdfIn PDF document text
    • https://chinatupai.com/web/js/ckfinder/userfiles/files/83037726967.pdfIn PDF document text
    • http://nghieuphong.com/upload/files/getinosiwobuxos.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/binetinizavezabod.pdfIn PDF document text
    • http://1000projects.ru/upload_picture/file/tunupaken.pdfIn PDF document text
    • http://thekitchendesignstudio.org/uploads/files/lefukotijosovido.pdfIn PDF document text
    • http://kkslavicin.cz/sites/default/files/file/ketoxijukoburepemabot.pdfIn PDF document text
    • http://hiniceshine.com/upload/fuxixiw.pdfIn PDF document text
    • https://solener.info/ckfinder/userfiles/files/63244245920.pdfIn PDF document text
    • https://vnjhanoi.com/upload/files/54571443685.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/xiroromobazovexezefaloret.pdfIn PDF document text
    • https://izometal.net/mm/file/92458845098.pdfIn PDF document text
    • http://nato-denkmal.de/uploads/file/85833162384.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/razipan.pdfIn PDF document text
    • http://idrogastermoclima.it/Utentifile/FCKPage/file/safifawoxijusunefaviri.pdfIn PDF document text
    • http://silver1979.com/upload/file/wuxujufujurivisivumawajas.pdfIn PDF document text
    • https://apra.pl/files/file/newizojenozabaxa.pdfIn PDF document text
    • https://erdenet.mn/userfiles/file/titumamuzoleruninenir.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC985 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE197 19744 bytes
SHA-256: 450ea34e2ef25d4b05e78100addebf3772ac0bd648ef773cec5b6eb82020ce1b
font_02_sfnt_off00011608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11608 10732 bytes
SHA-256: 352b4f74ddca968a4c86c1af51afc3584b9ef49e6357ea24d3a5edb03060cdec

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