Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4681b00249a731…

MALICIOUS

PDF

64.0 KB Created: 2021-09-07 15:29:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 56cfe88d7c5a9cb6ca1a4a54d8ca9af2 SHA-1: 1ff14f08ba147bbcf7ac12ff08f14bd1a4ca3cb9 SHA-256: 0e4681b00249a731d19e7ce3270885d99a9732d05f04875163040031de6c9037
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to host malicious files or redirect users to phishing sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are indicative of a phishing or malware distribution campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3241

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16082d9ddf3b82---10812838606.pdf In PDF document text
    • https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/xazipiboligitoziwekivew.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/47513338151.pdfIn PDF document text
    • http://kistours.hu/userfiles/file/tolig.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210706_153400.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/82415049469.pdfIn PDF document text
    • http://thesnowmanicecream.com/ckfinder/userfiles/files/10766464543.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/tmbpvs47npivvn72brcng0q7u3/zuforefanasukibed.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160daf624e153b---vosikixunozubo.pdfIn PDF document text
    • http://10glazsikeyrosa.ru/file/wumojedagudalesilezekepo.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/kijatazako.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/41958572846.pdfIn PDF document text
    • http://0048.pl/48files/file/51653432448.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/62328368551.pdfIn PDF document text
    • https://thietbigas.net/media/files/30224127493.pdfIn PDF document text
    • http://abpjseah.news-read.com/upload/files/31334826106.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098ecf69b9b9---degejezoso.pdfIn PDF document text
    • http://phoiinnhiet.com/images/uploads/files/4154670357.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/27621941680.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/xesisigoruralosiko.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/dfbcdb182f131d2a018ad2377db0babc/zepowunaguleka.pdfIn PDF document text
    • http://yilip.net/userData/board/file/164259672.pdfIn PDF document text
    • http://cnkls.com/userfiles/file/1625280479.pdfIn PDF document text
    • http://crystal-lamp.ru/uploads/files/33712047510.pdfIn PDF document text
    • http://dhf-china.com/d/files/lebugipiluwi.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/rofivekudelazodiju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=danelectro+spring+king+manualPDF link annotation
    • 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_off0000b9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9BD 10912 bytes
SHA-256: acc1e0c660040520977f32386a6d8f7ad8e1bfca7953023b5d00886f3458c272
font_01_sfnt_off0000d307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD307 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1