Malicious PDF — malware analysis report

Static analysis result for SHA-256 848ef7b6791a8621…

MALICIOUS

PDF

70.6 KB Created: 2021-03-31 06:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6064c870737ecf9f5a09b8f9d7a7c75d SHA-1: 9d19cd5e7c905b28a36614321701ba398dc2b1c7 SHA-256: 848ef7b6791a86219fd24bb95e7ca9877b3d7b044418b83cc71f8f5d0f9117aa
126 Risk Score

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 0.9998

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://xajibur.ru/123?utm_term=new+tamil+movies+2019++masstamilan PDF link annotation
    • http://kigadotezolesun.mypressonline.com/mixenubarixolipixopigur.pdfIn PDF document text
    • http://lozipazom.sportsontheweb.net/pumewafuwutefuferiki.pdfIn PDF document text
    • http://kevaduvapagenig.iblogger.org/antas_ng_wika_grade_11.pdfIn PDF document text
    • http://ebay-coupon.ru/kajebemizamanibomitolom6161.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/zutawosidukonujefururujog.pdfIn PDF document text
    • http://alkostore.xyz/majasavadivisb1odb.pdfIn PDF document text
    • http://support-copyrighthelpservice-about.com/what_is_contrast_in_interior_design3ah0i.pdfIn PDF document text
    • http://lozomaneje.getenjoyment.net/gizofulo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fubavinexazixo.onlinewebshop.net/84192616971.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/41163290094.pdfIn PDF document text
    • http://penobugixova.atwebpages.com/american_english_file_2_workbook_resuelto_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8e0c486-bd25-4399-b6f0-fab182c95fc5/sozilasilesuvifosometa.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/28933269523.pdfIn PDF document text
    • http://timerojulawu.myartsonline.com/ernie_ball_volume_pedal_jr_25k.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b1f8115-e9c8-4434-97d8-e08ee00d5775/custom_ranger_boat_covers.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/xexilemo.pdfIn PDF document text
    • http://wedosop.rf.gd/bedegijiv.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_off0000d80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80B 5340 bytes
SHA-256: 670ba5761c63c57c9683b8097ea685d558a4e189286a454194c43c85ecc1ecf3
font_01_sfnt_off0000ea40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA40 10244 bytes
SHA-256: 340cb962cbf03970ff0664cba309aa10e4a0eded4bab07be5af30bd971fda580