Malicious PDF — malware analysis report

Static analysis result for SHA-256 b09ff5a8d31c935b…

MALICIOUS

PDF

73.9 KB Created: 2021-06-12 22:12:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bce5e15142cd5940b7efc5cb7ce355b6 SHA-1: 0b08051ff85a0d24ba9ed2c30aa9091772bfc221 SHA-256: b09ff5a8d31c935b9584599d53d33d410699c340b4faa05a843cec1efc9370d1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/pbw?utm_term=android+games+for+money PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369143/normal_6041e1a4e6eb9.pdfIn PDF document text
    • https://wusafasugulub.weebly.com/uploads/1/3/4/5/134586051/1143330.pdfIn PDF document text
    • https://xuratofojiwob.weebly.com/uploads/1/3/4/0/134096374/230736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_601b354b3c5e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488560/normal_603a4085c89d7.pdfIn PDF document text
    • https://vadewowiruku.weebly.com/uploads/1/3/1/3/131382700/kebomo.pdfIn PDF document text
    • https://rapugudunoxe.weebly.com/uploads/1/3/4/0/134012743/musukom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413223/normal_606a8a7838492.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374372/normal_606ad18f0b274.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459057/normal_600481f5e757d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zanopadik.pbworks.com/f/38585045371.pdfIn PDF document text
    • http://bevojoluvu.pbworks.com/f/badukebuxajivumonarif.pdfIn PDF document text
    • http://bezawagiga.pbworks.com/w/file/fetch/144555555/how_do_i_install_my_webcam_on_my_hp_laptop.pdfIn PDF document text
    • http://pugaxigodaka.pbworks.com/w/file/fetch/144461913/el_monje_que_vendio_su_ferrari_resumen_por_capitulos.pdfIn PDF document text
    • http://ritijix.pbworks.com/f/warhammer_40k_harlequin_codex_download.pdfIn PDF document text
    • http://xulajirose.pbworks.com/w/file/fetch/145038858/gejawitigejumodajuvege.pdfIn PDF document text
    • http://nugewus.pbworks.com/f/xesojurapugu.pdfIn PDF document text
    • http://zofurutatag.pbworks.com/w/file/fetch/145141281/26512783296.pdfIn PDF document text
    • http://zuwuzemoj.pbworks.com/w/file/fetch/144673473/convertidor_de_archivos_dwg_a_gratis_en_espaol.pdfIn PDF document text
    • http://vafobotigef.pbworks.com/f/kubota_l3010_operators_manual.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE206 5288 bytes
SHA-256: b20e0004909e4278e3d75a8883dc42d4b8222192e9b66e907c11593b66032682
font_01_sfnt_off0000f3f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F8 10888 bytes
SHA-256: 753f288f79ea42c272bfa65225eeb86102e383beccff2eb5b2c45f1e2543627e

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