Malicious PDF — malware analysis report

Static analysis result for SHA-256 f30201337705866d…

MALICIOUS

PDF

76.9 KB Created: 2021-09-23 18:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1a52ed09b86ba326a6b1f190eb45a1dd SHA-1: 7ab435393c16b87d55f4802103f2802e6b8f9f94 SHA-256: f30201337705866d2024ab146e23e2baf5ada81ca0286c9f63d62d2fc160f0db
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to download a second-stage payload via the embedded JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

Heuristics 7

  • 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.
  • 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://irlanc.ru/uplcv?utm_term=khuda+hafiz+movie+download+720p PDF link annotation
    • https://pelletier-tp.fr/ckfinder/userfiles/files/zewesidavef.pdfIn PDF document text
    • https://jancsoalapitvany.hu/ckfinder/userfiles/files/96517262115.pdfIn PDF document text
    • https://srmhomes.com/images/bulk_images/files/92101839283.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/23599224296.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/zibeliduxawu.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140807c26107---48448760725.pdfIn PDF document text
    • https://nistd.in/userfiles/file/rigamisuwavunisaxelat.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613b3487da80d---96467017015.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/zusofosenuxuve.pdfIn PDF document text
    • https://www.totspotdaynursery.co.uk/ckfinder/userfiles/files/78993907809.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/notesunisuwitakizatagef.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/29620858622.pdfIn PDF document text
    • http://fireprovietnam.net/luutru/files/negopemofimap.pdfIn PDF document text
    • http://sbsinternationalschool.org/userfiles/file/92429372165.pdfIn PDF document text
    • http://lifecontinues.ru/images/files/budok.pdfIn PDF document text
    • http://sun-tes.ru/files/file/jetamuxigino.pdfIn PDF document text
    • https://chinatupai.com/web/js/ckfinder/userfiles/files/46254596452.pdfIn PDF document text
    • http://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/40545799571.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/pujesiwesopazutimoke.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/zozexega.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16138a575f29d5---92424227229.pdfIn PDF document text
    • http://ikkosushi.com/uploads/files/nenitobibixu.pdfIn PDF document text
    • https://ostrichpharmaceuticals.com/userfiles/file/nokakegugamifidorutomi.pdfIn PDF document text
    • http://sparkpro.lv/content/file/tavizetedeji.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/09d94416fb17269c61086e5fa2bc523b/1349031932.pdfIn PDF document text
    • http://koutingchina.com/upload/files/2040510672.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/jutabaruxurupo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dcf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF4 18196 bytes
SHA-256: 406a530f9522a63bbf2e01e5b0220b0c65e3761bab0abbb732efb261d3ee7083
font_02_sfnt_off00010c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5F 10992 bytes
SHA-256: ff47a3c9f06e2615e45a5f05e59571265161e320a1ce7e04302de0c9bc462b99