Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e9d0d7dedee9bcc…

MALICIOUS

PDF

95.6 KB Created: 2021-09-15 05:16:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ef32d5780162f1fe853ede0a9f897402 SHA-1: 5e2982c307877c0ce3d2466703a730c70381b6bf SHA-256: 4e9d0d7dedee9bccfc894ac250dc32ae5dbc255f129160de4dd37d0a68a627f5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://philabc.ru/uplcv?utm_term=windows+7+product+key+for+iso+download PDF link annotation
    • http://xn--80aguejfegacgj0ad.xn--p1ai/pict/file/juxolofazagegaweba.pdfIn PDF document text
    • https://cpc-serbia.org/js/files/87771967616.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f442ee658d---tixofipakokomivebujoz.pdfIn PDF document text
    • https://giridhareye.org/ckfinder/userfiles/files/64703434073.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/6cb8e12cb0b5a542c3535153a3c12799/26709459666.pdfIn PDF document text
    • http://wellfoto.cz/pictures/files/vozifefir.pdfIn PDF document text
    • http://anindecor.pl/files/file/torilevujubep.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/magumujimexif.pdfIn PDF document text
    • http://abyss.sk/userfiles/file/zajux.pdfIn PDF document text
    • http://www.puhito.hu/uploads/jemuvojedulubinabotunom.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/rijasexinodode.pdfIn PDF document text
    • https://triyoga-tv.ru/userfiles/file/72324651288.pdfIn PDF document text
    • http://thietbianninh188.com/uploads/files/mumezexumono.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/datevezuxogukato.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161413dd98144b---zenafutegaf.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/guzupitoka.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/36002761190.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/e39bd75a57a34b848e88096873c4deaf/10715155428.pdfIn PDF document text
    • http://smolninskayahotel.com/userfiles/file/lamor.pdfIn PDF document text
    • https://alkoplast.rs/files/94298956963.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/36390141053.pdfIn PDF document text
    • http://scsychem.com/upload/files/65153822218.pdfIn PDF document text
    • http://cbcom.eu/ressource/site-image/files/jafatabozenixikiz.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1614139b72a266---93364681302.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC0 16128 bytes
SHA-256: e086d997b6ee3c3fe48f8fdf49e8854b9e9bef9c53b5c2c5f26bba4f2b277426
font_01_sfnt_off0001031e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B35 11048 bytes
SHA-256: ebdeca14ad5a9e7326856f6af35165739d237b421a70a5e6eca8c04fa672e78a
font_03_sfnt_off00013534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13534 22936 bytes
SHA-256: ede1948d1b8f73750fcbb39be90348a84fe8874c6cf0b8c48df44f7c213a0cb1

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