Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9a80a01c44c428b…

MALICIOUS

PDF

78.2 KB Created: 2021-04-12 22:54:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e99af5f21a5026b8da186331a7ef10a9 SHA-1: 857949a87ba0f63d14f207ba6540c3a0c4eeedeb SHA-256: a9a80a01c44c428b019a13851fcb1333e26411f4c3ac5c0d9a489d43c77f7159
146 Risk Score

Malware Insights

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

The PDF document impersonates a cloud file-sharing service, a common lure for phishing or malware distribution. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'maypoin.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://maypoin.ru/strik?utm_term=how+to+show+character+count+in+word PDF link annotation
    • https://xopubuniwanofu.weebly.com/uploads/1/3/4/1/134131716/jasuxowewaju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368222/normal_60436e44ec791.pdfIn PDF document text
    • http://dhl-order.info/pixel_car_drag_tune3032w.pdfIn PDF document text
    • https://tidukefawa.weebly.com/uploads/1/3/4/8/134851120/dadda29b675e5b1.pdfIn PDF document text
    • https://cdn.sqhk.co/patizuruf/jg5juTY/cute_among_us_wallpapers_live.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493867/normal_6052c1bbb866f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418180/normal_60011fa86a61a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481154/normal_6026c82584d78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446770/normal_6054dda964065.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403952/normal_5ff944daaa7b3.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/74rEGmv/manapakkam_kanniamman_part.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460055/normal_5ffcbb761a8ac.pdfIn PDF document text
    • https://gibunuvupu.weebly.com/uploads/1/3/4/7/134746488/suxijos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382201/normal_5fdea4efebbbc.pdfIn PDF document text
    • http://duboxol.iblogger.org/1_cm_grid_paper_worksheet.pdfIn PDF document text
    • https://jipukikibowema.weebly.com/uploads/1/3/4/6/134633032/403dca8a51087.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/4hdGXhd/sotewetodasimujujizimuwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458148/normal_6020a5e06cd3f.pdfIn PDF document text
    • http://domen3.club/what_is_suffix_ly_mean7h9pm.pdfIn PDF document text
    • http://store50off.info/7552699636ybapg.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/zesanojavituvu-jabilipajep-suvirexig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vajowevub.epizy.com/55186678423.pdfIn PDF document text
    • http://kubunixa.epizy.com/16153403911.pdfIn PDF document text
    • http://lejemerane.epizy.com/abdominal_examination_osce.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_off0000f3e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E9 5048 bytes
SHA-256: 5bdbf2b42c25c281457464ef60b02a52c6d01e144046e859a0eba346459051bc
font_01_sfnt_off0001051e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051E 11292 bytes
SHA-256: 61f71b97878e76d80f95397214eb253ed0b4e94401f6656ecef450e8fff97fbd

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