Malicious PDF — malware analysis report

Static analysis result for SHA-256 bede34f136075792…

MALICIOUS

PDF

75.5 KB Created: 2021-09-08 22:07:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3ac9ee342e83f1503e471ddfad14dabe SHA-1: f061c5c2465de2e5d3e859f9bfa7ad3ef2c2479e SHA-256: bede34f136075792c8a77bc6daf9e97b441fbf10875ced6de0d1930837419f66
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which are part of a link farm hosted on disposable or compromised domains. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection or execution of further malicious content.

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://philabc.ru/uplcv?utm_term=line+square+apk PDF link annotation
    • https://ww150006.linebot.net/upfile/files/20210902032505.pdfIn PDF document text
    • http://gildiamasterov.ru/userfiles/file/diropesux.pdfIn PDF document text
    • http://cattaneoarchitetti.it/userfiles/files/dunutoxezusawirigunojib.pdfIn PDF document text
    • https://livewireeventz.com/userfiles/file/xupisuzosanopitu.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/gskuc5af03kjeamqnjmauf8go8/26814650659.pdfIn PDF document text
    • https://ikorti-iao.com/userfiles/files/94795374104.pdfIn PDF document text
    • http://premiumdrinks.eu/userfiles/14112332572.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe7f658893---rizekoduwunorikudamudilu.pdfIn PDF document text
    • http://bischofs-scheune.de/userfiles/file/10595583239.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/tesezalaxixelavijazet.pdfIn PDF document text
    • http://sensitiva.fi/UserFiles/File/fameturuwabutobogi.pdfIn PDF document text
    • https://wtmasonry.com/ckfinder/userfiles/files/togawonuwexej.pdfIn PDF document text
    • https://neurondevelopment.org/userfiles/file/38219825072.pdfIn PDF document text
    • https://www.info-service.com.tw/plugin/ckeditor/ckfinder/userfiles/files/bonul.pdfIn PDF document text
    • http://grupophi.es/uploads/files/73638389592.pdfIn PDF document text
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/11713007875.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/002be80af35d1a37142d5521c24d0a1f/87080253772.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/kasexagizexadojivuvasif.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16137477520f86---50344974671.pdfIn PDF document text
    • http://graphicyazd.com/ckfinder/userfiles/files/46377147234.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/xowirapexanizimexarokato.pdfIn PDF document text
    • https://grupo.iberia.es/js/ckfinder/userfiles/files/lefapisifetamonufojiwit.pdfIn PDF document text
    • http://iieng.org/editor/ckfinder/userfiles/files/60086549220.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_off0000c33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC33B 10276 bytes
SHA-256: a153a2fac529f6252eb461d7670445cbeef8efd5eefc6bb10ae619098750bb45
font_01_sfnt_off0000da69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA69 17800 bytes
SHA-256: b713addf6212488e313a3d5e33620d3f5a1bcac6bab6ebb20001422a7271867a
font_02_sfnt_off000108fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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