Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5a205a367f96933…

MALICIOUS

PDF

77.1 KB Created: 2021-10-06 03:45:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: b745471c443d8ae4e7ada8aeeb4ba8e3 SHA-1: 56966fbf963f124920b667816d629f3df966ac9c SHA-256: d5a205a367f96933b0bfd76b5bb2c719e0a9bfbbc9f234a6ae15ba68e4c3edba
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous external URLs, many of which point to compromised websites or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to download and execute a second-stage payload. The presence of embedded JavaScript (T1059.007) and the nature of the URLs suggest it's intended as a phishing attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://wastran.ru/uplcv?utm_term=0+to+6+pack+abs+pdf PDF link annotation
    • http://labmansour.com/app/webroot/js/ckfinder/userfiles/files/55111124346.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/2tpbbrc8ifevv81q29qs0k0glg/84180328190.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/zudezerinagawerejupinanew.pdfIn PDF document text
    • http://wieswioska.pl/userfiles/file/vezur.pdfIn PDF document text
    • http://artdental.hu/editor_up/sirogevenexexinoxuro.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16139e929dec87---30713548316.pdfIn PDF document text
    • http://khaskhaan.mn/uploads/userfiles/files/59631679376.pdfIn PDF document text
    • http://www.leposeur.fr/site/upload/ckfinder/files/gerinu.pdfIn PDF document text
    • http://lmleadmanagement.com/userfiles/files/keranepejowaritameguli.pdfIn PDF document text
    • https://sharjahcements.com/images/bulk_images/files/jovepimovega.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/nemofalol.pdfIn PDF document text
    • http://aqcorth.specialty-match.com/upload/files/fenetegivimevisenak.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/10141647720.pdfIn PDF document text
    • https://jetaime-shop.dvsportbg.com/files/foworomozabafixujikorif.pdfIn PDF document text
    • http://tivatijapan.com/uploads/userfiles/file/xewujapikurapamar.pdfIn PDF document text
    • http://dichvutheapec.com/upload/FCK/file/kasibexuted.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/vodamutawekok.pdfIn PDF document text
    • http://jnmindia.com/outscapes/admin/ckeditor/uploads/ck/files/22311021882.pdfIn PDF document text
    • http://vimar.ua/userfiles/files/33289347841.pdfIn PDF document text
    • https://gkscam.com/userfiles/file/78944993409.pdfIn PDF document text
    • http://ediliziaunoaventi.com/userfiles/files/ligavowusewefeduzu.pdfIn PDF document text
    • http://makassitools.com/userfiles/file///fegik.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133030d6d517---54776345242.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_off0000c80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC80B 10564 bytes
SHA-256: dd67a7ff3a23b48c7e300d4e21b8156ec24207ebb26fdd6c46c25c26c149ecc9
font_01_sfnt_off0000e011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE011 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF823 18108 bytes
SHA-256: 9347d10210a96362d323463adddca84bf5b7ae63c12ac520153fc80d91a9bb97

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