Malicious PDF — malware analysis report

Static analysis result for SHA-256 a14a6a847fb1d97e…

MALICIOUS

PDF

69.8 KB Created: 2021-09-28 15:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 072105b25508b25381de313a1d758d18 SHA-1: 1ecce41c13548ead7cb0cf15ec3a9b72bba370a0 SHA-256: a14a6a847fb1d97ea818eff7fcc1c5d50a8700fbea3eb955be8bcedb9d99098e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The presence of numerous external URLs, including one pointing to 'pistant.ru', suggests an attempt to redirect the user to a malicious site or download further content. The ClamAV detection 'Pdf.Phishing.Trojan' strongly indicates a phishing or trojan delivery intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4270

Heuristics 5

  • 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
  • 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=fighting+force+ps1+rom PDF link annotation
    • http://cariboohose.com/userfiles/file/wotovotiwimefox.pdfIn PDF document text
    • http://solemarservizi.it/userfiles/files/tobivanunupanaziraso.pdfIn PDF document text
    • http://elfast.ru/userfiles/file/tifevapadog.pdfIn PDF document text
    • https://mertlakustika.cz/images/pages/file/dizenifanomiruvojibos.pdfIn PDF document text
    • https://hongming-eco.com/userfiles/file/62255902500.pdfIn PDF document text
    • http://zoekidsworld.com/userfiles/file/wisuratoxidagikaj.pdfIn PDF document text
    • http://baltyk.recykling-rejs.pl/imgturysta/files/kirot.pdfIn PDF document text
    • https://latework.cz/soubory/jegokinekezekojalafadiman.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1614b0ed2a2633---rifilinokevifotipem.pdfIn PDF document text
    • http://e-photo.lv/ckfinder/userfiles/files/kewesifawasuwunawidure.pdfIn PDF document text
    • http://hijoin.hu/editor_up/11178071339.pdfIn PDF document text
    • http://bwc.lt/i/83816426383.pdfIn PDF document text
    • https://uleiuri.ro/userfiles/file/27120279611.pdfIn PDF document text
    • http://girlstown.org/files/js/ckfinder/userfiles/files/49255358549.pdfIn PDF document text
    • http://guanzhuli.com/userfiles/file/73636339766.pdfIn PDF document text
    • https://optical-axis.com/uploads/files/202109100743579979.pdfIn PDF document text
    • http://tscyw.net/userfiles/file/20210928034241_j8x8ng.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/40383172607.pdfIn PDF document text
    • http://duquenne-moteurs.fr/webroot/upload/files/26257517725.pdfIn PDF document text
    • https://asi-filter.pl/files/file/77889069642.pdfIn PDF document text
    • http://aedjtj.pretty-match.com/upload/files/sigeruloxev.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/92843603797.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/72657827552.pdfIn PDF document text
    • http://www.aaar.cat/assets/js/ckfinder/userfiles/files/gifefizegugulisizexu.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/saxapija.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_off0000c497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC497 20964 bytes
SHA-256: 5368af0a979fd7bd3bec7a035745383f0fdd5bee211cb96ab5fefe1f2ffbf0c5
font_01_sfnt_off0000fafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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