Malicious PDF — malware analysis report

Static analysis result for SHA-256 2649f74d395f5659…

MALICIOUS

PDF

81.1 KB Created: 2021-07-29 19:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 44d429a15e50dedd9545bbc093dd953f SHA-1: 492b567a85608f9d6ffd272eb45698b8ec696bc1 SHA-256: 2649f74d395f5659160d69bc1e62d6c16cdd6ebebc4cb3d9fd2a611e52f7df89
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://wastran.ru/uplcv?utm_term=descargar+musica+gratis+de+banda+ms+somos+los+que+somos PDF link annotation
    • http://alumcity.ru/userfiles/file/16035471108.pdfIn PDF document text
    • http://leebyenghun.com/new/upload/board/files/dazewuvozasowob.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/53802109472.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4d9b3619d---fumigubunituven.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/925f8338ca10de61ff9f6a6791161d7e/7173589023.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160897bf2ac4fb---wodadojavevo.pdfIn PDF document text
    • https://lotteppta.com/beta/assets/file/8633863505.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/b4227c7b6dc5c04fd4d68e6f3460db4f/75342676550.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/31177547745.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc002ad5e9---sigerazitesolefasafa.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd31416434---jofonevazutopanadaroxiba.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/84331942516.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/45e9c784ee70a41d373c80f6431f4be0/tonogidugezimagiruranosa.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d05bf38316---dikezikulox.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/2812256675.pdfIn PDF document text
    • http://carszana.com/image/upload/File/tarotir.pdfIn PDF document text
    • https://i-intelli.com/ckfinder/userfiles/files/xogisixagipaxabemuk.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/latexufixevunose.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/28roehh2375f11sodo9gfkou2o/jagepavawexovalutozomemo.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/59dd73b7522bf8c77b68da7d17d65cfa/jinema.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/fanatibivopa.pdfIn PDF document text
    • http://thomasbelldescendants.com/clients/40432/File/lerugiwozudobezaso.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_off0000d048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD048 20104 bytes
SHA-256: 437ff0e7aeedff9be14d048dce0551535360b46a01f422e927694087836a76b2
font_01_sfnt_off000101f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F1 11100 bytes
SHA-256: 55f802e439b665a5ec29fa5da9d39e7075b220440d96e60359020d68995aa9e2
font_02_sfnt_off00011b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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