Malicious PDF — malware analysis report

Static analysis result for SHA-256 353e613e01fc0aca…

MALICIOUS

PDF

74.7 KB Created: 2021-09-04 00:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: c275720f44a0f0504fc1f9efcfd729d6 SHA-1: c86dee0d301ff6e9ae14643809dc8c06b07a638b SHA-256: 353e613e01fc0aca886e55c2d69900daddca8d094486a7b67a2e76aba5b3d723
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and a large number of external URIs, many of which point to compromised CMS upload directories. The embedded JavaScript likely serves to download and execute a second-stage payload from one of the provided URLs, facilitating a phishing or malware distribution attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://philabc.ru/uplcv?utm_term=unisa+assignment+cover+page+pdf PDF link annotation
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9484657fb---64201025204.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/pulonikon.pdfIn PDF document text
    • http://artospace.com/pics/file/41882532728.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f63c8c28789---78840988756.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/bamonebiz.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a294c55a3f4---bisifi.pdfIn PDF document text
    • http://hokkaido-love87.com/app/webroot/js/ckfinder/userfiles/files/jumewebiroguvunamaraturo.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/50626603321.pdfIn PDF document text
    • http://upoart.com/ckfinder/userfiles/files/dumadotulal.pdfIn PDF document text
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/80031326665.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/fff403b6aac710efdf3dcda5d3bce630/gitesabibapolufubu.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160e3546195b4f---juwefutugototopozejera.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/g7vbsa90v2f8llgge6ivk0qb8g/47372675962.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/4cabb7e833b03572494cbb03941b8353/pijofefetofuvo.pdfIn PDF document text
    • https://wronba.pl/uploads/wysiwyg/file/78347745350.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/fdc062ff5c69307f14648185530f764c/87360901765.pdfIn PDF document text
    • https://sayurmateng.com/contents/files/80668501737.pdfIn PDF document text
    • http://ranjitabiswas.com/userfiles/files/84590556166.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/5c43c10c3a0b25303a03652d10208f61/96602980593.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/m9c1rvlao8ocfvmi2cv6910gjo/pigopopeni.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210602201636.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/be8b66b7bd9e47bf7e820e5f07719d52/74952935318.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_off0000bf51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD768 10992 bytes
SHA-256: 12a80c7b8aac9da065fd0f093a2483b56fc1919de14b12523565c712843c3d66
font_02_sfnt_off0000f0bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BC 17320 bytes
SHA-256: ebb6db29cb49e423bed2d834dd583efeecef70b2a15207bde97c52b19d12be0c

Open this report in the interactive analyzer, or submit your own file for analysis.