Malicious PDF — malware analysis report

Static analysis result for SHA-256 40b670d7dea6a11a…

MALICIOUS

PDF

42.4 KB Created: 2020-10-31 05:28:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 182ef8796be1014d69b0f111d18f7669 SHA-1: 4a02e49190edc441568e3e004b667ee4d9443ef0 SHA-256: 40b670d7dea6a11a169e218384bc0fc90cc01865b2aaec0a8631fee86608b427
94 Risk Score

Malware Insights

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

The PDF contains an embedded link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL likely serves as a lure to download a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ttraff.club/123?keyword=open+workbench+software In PDF document text
    • https://segakimorepej.weebly.com/uploads/1/3/0/7/130738797/63a323f55ecf7.pdfIn PDF document text
    • https://tiwilofudux.weebly.com/uploads/1/3/1/6/131606348/c780425832e3f98.pdfIn PDF document text
    • https://radisowe.weebly.com/uploads/1/3/4/3/134366404/703e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/46242034791.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae4629f6-41ab-447a-8714-c5d82d463222/98149074086.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e9ef4ee-096c-4508-b729-8577d2a58c12/gapejimijejop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e07806c8-ec3f-44f2-875d-1bb71b28744e/jadizejuwegip.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/40697348952.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0164a27-fc09-4807-a476-f2e876bd8e3d/sedek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acaeceef-3f1d-4e59-9478-362e5d339c0f/free_download_simcity_4_rush_hour_fo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3861/9813/files/tomtom_go_6200_manual_dansk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/9524/9847/files/wuburatilisugapepusu.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/gafupovoni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0723/6023/files/ap_calculus_ab_multiple_choice_2014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3124/7020/files/plague_inc_strategy_guide_bacteria.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_off00006818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6818 5396 bytes
SHA-256: d713562b42f12ee79407ba83fdb102a023a83c876de6367c5a7329c36b8f34b0
font_01_sfnt_off00007a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7F 10208 bytes
SHA-256: da45fbda775f29b8f710f3fb91b567451788a62ba1ddbd1b5154cd1f72f6d9de

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