Malicious PDF — malware analysis report

Static analysis result for SHA-256 284b83b3cb2471ba…

MALICIOUS

PDF

86.6 KB Created: 2021-07-05 00:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 1dd305505c9d546e4d75a0a869bca5d6 SHA-1: dbe93cc0fbf4eddfed76a938baa1ebed1b923c57 SHA-256: 284b83b3cb2471ba537a2298cdc1fc373713ee123483a66aa8f38a2d7b4618a2
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. It contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress upload directories. The presence of embedded JavaScript suggests potential for malicious code execution, while the link farm indicates a phishing or credential harvesting attempt. The file's structure and content align with a phishing lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://oniceh.ru/uplcv?utm_term=which+is+colder+neptune+or+uranus PDF link annotation
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a42fde67a3b---40579988086.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/9027263121.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0a0bb9eb6---kitemufelomijebagufel.pdfIn PDF document text
    • http://viettelhaiphong.me/data/dulieu/files/45870293256.pdfIn PDF document text
    • https://lesfeesdelhetre.fr/upload/files/ziravesalimorokuwaval.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/a0885b70d2b7325ae4cdaf7fad618750/76532417383.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/908urmjefe19kqn0nd22ej8uu5/78953165347.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f220b7200---fibomivumekakogodiropodeb.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ffc1cc5f02---30061640046.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/32929876670.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/41717065812.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/c0qjibbqrbj47rqd3moflcpteo/tatad.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16075cbfc17752---23832597925.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/5d527eda15365ce5530872c6444c5cea/zabedisevugosizosexes.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/ea0d7401b0e67c9751f8e9dc1d4aefc5/84886929529.pdfIn PDF document text
    • http://wonikqnc.com/upload/editor/file/1622537876.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/jofekinodul.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/29c5a1a574c050cb24d959fbebb05ed3/mofajitun.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/bbo6hfead2mqlh0m767ijdih3s/molugabajuboki.pdfIn PDF document text
    • http://greatnice.club/updatefiles/file/zukimepisawatolovodix.pdfIn PDF document text
    • https://i-chat.tw/js/ckfinder/userfiles/files/wugoxa.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/d18fb4eb92a104ef0d44a48ab65d05b7/15287030471.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ab2ed9a50---mitaj.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/pudikomuxasedaxetitoserog.pdfIn PDF document text
    • https://digireg.cn/upload/reludadejorekufava.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_off0000f24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24F 16252 bytes
SHA-256: 8050d857fb538859a208f09cb2e154bd1b469f6a67326f596eb82da918183e35
font_01_sfnt_off00011c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001346d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1346D 10704 bytes
SHA-256: 24ef6b8f3d1f709f67bad8cceb08b48d23ce82e8b80bc956394bf15de36e000f

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