Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d7d4455f1ae43da…

MALICIOUS

PDF

67.9 KB Created: 2021-09-14 12:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 16bcc1e0c65d0265045a90541060836b SHA-1: 2e0c6594687cddb2a02e63a89ca597d9be2de27c SHA-256: 1d7d4455f1ae43da6b7f9e668e4dfe5d7ca6648b08565d5d0ed483376e386dd6
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file identified as malicious by ClamAV. It contains embedded JavaScript and a large number of external URIs, many hosted on disposable domains, indicating a likely phishing or malware distribution attempt. The embedded JavaScript is a primary indicator of malicious intent, potentially used to redirect users or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2639

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.
  • 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
  • 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://philabc.ru/uplcv?utm_term=clash+of+clans+coins+and+gems PDF link annotation
    • http://autoscuolepintozzi.it/userfiles/files/256185892.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/2831943486.pdfIn PDF document text
    • https://www.renfrewareahealthvillage.ca/ckfinder/userfiles/files/7032273857.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/58589062361.pdfIn PDF document text
    • http://qianxish.com/ckfind_image/files/fetijexetimi.pdfIn PDF document text
    • http://lakesnwoodskerala.com/uploads/file/xajorikar.pdfIn PDF document text
    • https://netiko.fr/img/Data/file/80770149093.pdfIn PDF document text
    • https://paeonia.ch/userfiles/files/vubiwu.pdfIn PDF document text
    • https://bearings.vn/images/ckeditor/files/39465428573.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/4420341322.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/rabigejusewogisasabe.pdfIn PDF document text
    • http://nagyberki.hu/sites/default/files/fck_uploads/file/komowolekuviliki.pdfIn PDF document text
    • http://fskyok.com/uploadfile/files/zukurilisiwibamok.pdfIn PDF document text
    • https://www.jakketoes.be/ckfinder/userfiles/files/jejuvonolofifopizelovosuz.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/dilifepuvovifiduwo.pdfIn PDF document text
    • http://prepearl.com/uploadsfile/10296404846.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/nusabujozaxebiwog.pdfIn PDF document text
    • https://tongdaidoanhnghiep.com/app/webroot/upload/files/xodexokupawexagiluvajobe.pdfIn PDF document text
    • http://www.mmd.ntou.edu.tw/ckfinder/userfiles/files/48210533558.pdfIn PDF document text
    • https://ddtoyz.com/ckfinder/userfiles/files/fiwoxipowipe.pdfIn PDF document text
    • http://kaizousha.com/js/upload/files/wisopasum.pdfIn PDF document text
    • http://asztalosweb.hu/userfiles/file/mitatevamukugivazuku.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202109030053585551.pdfIn PDF document text
    • http://karthikeyanjayaram.com/userfiles/file/70568131791.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/zosawi.pdfIn PDF document text
    • http://hondatayho.top/img-ngocbao/files/36358315505.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_off0000d8e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E8 10756 bytes
SHA-256: 84229dc31d8f177b38f652f9fb885e69ede821bc6fe32eea4babe2ee8cc7282a
font_01_sfnt_off0000f13a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1