Malicious PDF — malware analysis report

Static analysis result for SHA-256 48ba7490442a3220…

MALICIOUS

PDF

69.1 KB Created: 2021-09-25 23:37:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7b2e55f7817b44ea217ae46c2145555d SHA-1: 9deb6635e9e817de35b872107e9acbebc8c79d68 SHA-256: 48ba7490442a3220673c2fe8f08cfca3774f5450f816f1a9b4970210917b2de9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous links pointing to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URI indicators and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • 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.
  • 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://chcial.ru/uplcv?utm_term=winning+2012+football+game+download PDF link annotation
    • http://wmc21.com/ckupload/files/74588126703.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/e76b12370f0b7dbeeff0d6d85458785d/26984694377.pdfIn PDF document text
    • https://altstudio.be/app/webroot/uploads/file/dofizusiselopowibisejogif.pdfIn PDF document text
    • http://waetsukai.jp/system/ckfinder/userfiles/files/nodezelevavijizipazejadap.pdfIn PDF document text
    • http://csc0451.com/userfiles/file/20210911223624_3orgo3.pdfIn PDF document text
    • http://gitishahjahanpur.org/ckfinder/userfiles/files/fedirokuvowemilozipetupep.pdfIn PDF document text
    • https://polnische-zaune.de/userfiles/file/wupel.pdfIn PDF document text
    • http://gorod-r.com/userfiles/file/xijaki.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/xexuzimekeliwogalipo.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/reletexenipozuzofezo.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1614734e846535---tabija.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/161462ddb11f22---golikije.pdfIn PDF document text
    • https://coverline.ro/userfiles/file/36401326945.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/218cc0ce43a409cbbb368c673d7bcc16/nizorafokevugafajenofal.pdfIn PDF document text
    • http://sky1981.com/asset/uploads/files/tulewunadejuvuroza.pdfIn PDF document text
    • http://medi-sen.com/files/files/tunuzidotirifig.pdfIn PDF document text
    • http://rsport.eu/yonexshop/static/file/votuwitejofojawefo.pdfIn PDF document text
    • http://sin-hua.org/userfiles/74466269766.pdfIn PDF document text
    • https://acconpriti.com/ckfinder/userfiles/files/xanederu.pdfIn PDF document text
    • https://apexsafetyproducts.com/ckfinder/userfiles/files/6163190695.pdfIn PDF document text
    • https://latgalesamatnieki.lv/files/file/48278344130.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fdbfcc5532---savarapiselofukefi.pdfIn PDF document text
    • http://tiendanatacion.com/noticias/files/kipebosiketofot.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/1a5cddd7fc214095fab708ca0ffeb832/sokuremosigozasoviro.pdfIn PDF document text
    • https://ateliersmq.com/pevron/www/img/file/wanagiravidexogamodefa.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_off0000b05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB05E 10940 bytes
SHA-256: 32fce3802f31a1c3522fb0b096e4ac2ae5975f4d6a0a4a5148ac4ddf179561de
font_01_sfnt_off0000c9a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e1b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B2 14684 bytes
SHA-256: 9bf215072f15cd68699aab6adb6c8d8e8af9cd123d5293d0add2b4d345269d77

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