Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b57f898936d200…

MALICIOUS

PDF

72.0 KB Created: 2021-09-20 05:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b09681e391c91c29794473352ae34faf SHA-1: ef60ed4d2ab663d0dbbd4f76d5983e63e683cbf7 SHA-256: 06b57f898936d200b9122f03b4b6d816f332fc88effae9e4739a0457e6bd323d
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. ClamAV detected it as Pdf.Phishing.Trojan, further supporting malicious intent. Although no scripts were directly extracted, the structure and embedded URLs indicate a likely attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4393

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://pistant.ru/uplcv?utm_term=most+popular+android+podcast+app PDF link annotation
    • https://piphoto.tw/uploads/files/202109112127472220.pdfIn PDF document text
    • http://hueide.com/upload/files/71540255109.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161456be7457a7---sinosepuguruv.pdfIn PDF document text
    • http://qamsar.org/userfiles/files/xosusevutoxoxijovujopemi.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/72959786569.pdfIn PDF document text
    • http://westhollywood.ilovepokebar.com/uploads/files/92338518281.pdfIn PDF document text
    • https://drlalashow.com/php/billboard/uploads/file/towulobokapelakusexowise.pdfIn PDF document text
    • http://bkdesign.ee/userfiles/file/71917697159.pdfIn PDF document text
    • http://dieukhactransam.com/uploads/files/5982248309.pdfIn PDF document text
    • https://mywayrtk.com/userfiles/file/ripefatizopekazogubuz.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/19229118756.pdfIn PDF document text
    • http://lube-stc.com/ckfinder/userfiles/files/ropolofodumezugowelemaje.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/juzija.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/4197350581.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/4m50kafk82q370crjvpafvuq41/81616959697.pdfIn PDF document text
    • http://fitviewer.de/files/file/buxixugudobum.pdfIn PDF document text
    • https://www.tahitotfaluovodak.hu/ckfinder/userfiles/files/70790050202.pdfIn PDF document text
    • http://webinaris.blog/ckfinder/userfiles/publics/files/vurodugitividelawozu.pdfIn PDF document text
    • http://lakesnwoodskerala.com/uploads/file/jazojipi.pdfIn PDF document text
    • http://hasyo.net/files/file/1743319852.pdfIn PDF document text
    • http://xn-----6kcaheblih5ab0a6afqbzoqe.xn--p1ai/ckfinder/userfiles/files/mifutiropurane.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/pagazibujalorek.pdfIn PDF document text
    • http://ed-union05.ru/files/file/jadenisafugepo.pdfIn PDF document text
    • http://bergepkolcsonzo.hu/userfiles/file/sereb.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A9 10468 bytes
SHA-256: c0f2e4265f3bdbd96378b1431043c852187f5c10ffa8264198fd50de826e8bb5

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