Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb6361199859264e…

MALICIOUS

PDF

70.4 KB Created: 2021-09-19 21:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7efe9b7adf7bb97941f85a27b6cc4965 SHA-1: d76635869d7fe07cf6e38b3797cd4b16e297401b SHA-256: cb6361199859264ee93219de8c6ee841fa5adbe91af49eb6c7cae2d628f6df50
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to deliver malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://smidgel.ru/uplcv?utm_term=fall+guys+free+on+android PDF link annotation
    • https://bold-iot.com/uploads/files/202109131747065363.pdfIn PDF document text
    • https://r4binsh4h9-att.com/contents/files/given.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/nededefiwozud.pdfIn PDF document text
    • http://vikingpaint.com/user_file/file/timetiwibi.pdfIn PDF document text
    • https://kuraniterbiye.com/resimler/files/wikeguzojuwopapuga.pdfIn PDF document text
    • https://artofsurfing.com/preview/ckfinder/userfiles/files/37112310242.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/238896faf7a6779326f96b0d9a350c75/jesal.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613743123cbd9---28736549507.pdfIn PDF document text
    • http://pazarziraat.com/userfiles/file/68974693938.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/a4cb9e061352839ff3486a0d7027ed31/52416840969.pdfIn PDF document text
    • https://jeevandeepspecialcare.com/ckeditor/ckfinder/userfiles/files/69761762623.pdfIn PDF document text
    • http://placc.info/up_image/jifupugo.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613e890fe755a---busiguzorasuber.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/82gq8igkfac987e0paocr5l469/38638613983.pdfIn PDF document text
    • https://thietkeweblongan.com/upload/files/22047959175.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/8681568572.pdfIn PDF document text
    • http://parilka.by/var/upload/file/12222864696.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/86e74232f2dd31a033c00ed6bdc61668/gonuwoz.pdfIn PDF document text
    • https://renewone.de/files/3852843777.pdfIn PDF document text
    • http://wxbeimei.cn/upload/ckimg/files/202109060724396190.pdfIn PDF document text
    • https://hunglivet.com/uploads/files/202109061745323025.pdfIn PDF document text
    • https://curtain.jinware.com/upload/files/kawoloziwozox.pdfIn PDF document text
    • http://fcgo.tw/uploadpic/files/gawizologufinazenugun.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_off0000b3f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3F8 15764 bytes
SHA-256: 76be23bd99935d8560333facca1fc6521f0d1d3812ebacabb164d0734a12e8af
font_01_sfnt_off0000dbfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFB 10624 bytes
SHA-256: 2d4c9c4171d24c07695af4fb39824bef2ce27aac93a2e7aadee589482b8439b8
font_02_sfnt_off0000f42e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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