Malicious PDF — malware analysis report

Static analysis result for SHA-256 95fe50bd655674b8…

MALICIOUS

PDF

74.7 KB Created: 2021-06-08 21:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2d52c1151ed5ae20dadb507f81524e81 SHA-1: 3324e1fa9f831facaa9c024da8492216a7a71dcd SHA-256: 95fe50bd655674b851264843947188d5c83466791830c452d97389cac0e7155e
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it uses a social engineering lure to trick users into installing a browser extension or update, and it contains external URIs pointing to potentially malicious domains. The presence of embedded URLs and the nature of the heuristics suggest it's designed to facilitate further compromise, likely through a malicious download or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://irlanc.ru/pbw?utm_term=idm+offline+installer+with+crack PDF link annotation
    • https://firuruxuzero.weebly.com/uploads/1/3/7/5/137502241/wisanijogepuxitujo.pdfIn PDF document text
    • https://perelixaji.weebly.com/uploads/1/3/4/8/134881923/65f94.pdfIn PDF document text
    • https://dapemoko.weebly.com/uploads/1/3/4/6/134647299/mopenijakelezarodud.pdfIn PDF document text
    • https://tojemevu.weebly.com/uploads/1/3/1/3/131384016/9516372.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d58e733d-3a49-465a-82e6-83f38519e433/99666560072.pdfIn PDF document text
    • http://lovixov.pbworks.com/f/voposefetes.pdfIn PDF document text
    • http://vazesuna.pbworks.com/w/file/fetch/144508800/56620461588.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/f/68566611861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/414f7108-c4b9-45dd-87f3-b16ffb93fd3b/buzarewikufuziz.pdfIn PDF document text
    • http://zepupifob.pbworks.com/f/wujekuder.pdfIn PDF document text
    • http://gexufak.pbworks.com/f/free_simple_land_purchase_agreement_form.pdfIn PDF document text
    • http://vatojorisa.pbworks.com/w/file/fetch/144470709/55307853083.pdfIn PDF document text
    • http://nitezug.pbworks.com/f/download_amazon_prime_video_premium_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b62a34b8-d442-4381-a331-9ed8eafe5d4e/pe_practice_exam_free.pdfIn PDF document text
    • http://xizegopago.pbworks.com/f/book_series_like_50_shades_of_grey.pdfIn PDF document text
    • http://nonesupul.pbworks.com/f/descargar_rc_yowhatsapp_v7.70_cios_edition_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/160dfc8e-0fd6-401c-ad9c-bc697b931fa1/tomoweno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81fb309c-2091-4dae-90bb-dfdcc7355e93/dewalt_10_miter_saw_cordless.pdfIn PDF document text
    • http://bawamotijeku.pbworks.com/f/xafovov.pdfIn PDF document text
    • http://kesowununak.pbworks.com/f/56795683940.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_off0000e635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE635 5352 bytes
SHA-256: 7fea4d1192563afe6c6c9d216df7b386e553d8a09783d7e7a73dfe51997c63c2
font_01_sfnt_off0000f853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF853 11264 bytes
SHA-256: d452d2b65e2e32a79fd328da141fe70af89d9bfe15751a7110154fc822f373fd