Malicious PDF — malware analysis report

Static analysis result for SHA-256 125ed18070202b4e…

MALICIOUS

PDF

68.8 KB Created: 2021-09-15 17:29:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5e157d95b0f9eb195e4edeb9baf5d7e3 SHA-1: 95b9c8d57f74d1251bff6a9516fa500942daa06e SHA-256: 125ed18070202b4eb048af00be6e307c82338e130ecf3a7a3a62557940d8fc1e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the presence of a link farm, with many URLs pointing to compromised CMS upload storage or disposable hosting, suggesting an attempt to distribute malicious content. The embedded URLs are likely intended to redirect users to download further payloads or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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://widerbet.pl/userfiles/file/solegek.pdf In PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/tu8r3upkhm0sj9buklb17roi71/17800109441.pdfIn PDF document text
    • https://www.sterlingsez.com/ckfinder/userfiles/files/55276656554.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/88090283145.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/65488661613.pdfIn PDF document text
    • http://gesgo.de/userfiles/file/21472169404.pdfIn PDF document text
    • http://hcbarrett.com/user_area/file/50647130633.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/ripobisa.pdfIn PDF document text
    • http://tostonet.cl/ckfinder/userfiles/files/75642579952.pdfIn PDF document text
    • http://hatdesechia.com/storage/ckfinder/files/44495396550.pdfIn PDF document text
    • https://narellesastro.com/userfiles/files/kikatapalovimasopiwivoduw.pdfIn PDF document text
    • https://telenovella-bg.com/files/83456026220.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/36208343446.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/27347320259.pdfIn PDF document text
    • http://kerama.altrodesign.eu/ckfinder/userfiles/files/28370852434.pdfIn PDF document text
    • https://cv-vezouze.fr/media/file/kunita.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae90c56289---93911570473.pdfIn PDF document text
    • http://zekejozsef.eu/FCKfeltoltott/file/60554296553.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/37443512639.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1612eaaf9d2269---31014821632.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/jmehr5v9sr1f2ie6urgobvmd93/wuxano.pdfIn PDF document text
    • http://www.oteliapelsin.ru/ckfinder/userfiles/files/66144115469.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/dimozugulivo.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/e14e37866fad2fc2b4967a7abc96e8cd/tuwerowuwuvababuk.pdfIn PDF document text
    • https://hanoihome.net/img_duhoc/files/5240278263.pdfIn PDF document text
    • http://slenderclub.cz/ckfinder/userfiles/files/67652594300.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/38620060541.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=download+pc+on+androidPDF link annotation
    • 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_off0000b3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3AA 14124 bytes
SHA-256: ffdc981b750de564c3b7294ad027934a6a9c70d31337e634735acbcb26cd81a0
font_01_sfnt_off0000d6c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C0 10196 bytes
SHA-256: 91fcf09fdc9f21b863fa025fbcbefde07af215c5fcda9534901cdf8258de806f
font_02_sfnt_off0000eda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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