Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4d1a61b249c2d2e…

MALICIOUS

PDF

38.7 KB Created: 2020-11-03 02:03:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f114785f7d452e895e03be5fb90e75df SHA-1: 5618fc863b9c8dc0297f638c377bb6ee9577532c SHA-256: f4d1a61b249c2d2e15fb44b3473902d3aaca6a1abaf95437078b8b85013f26c4
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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=tragedy+of+the+commons+worksheet+answer In PDF document text
    • https://betoxugibujimiv.weebly.com/uploads/1/3/1/0/131071043/1821451.pdfIn PDF document text
    • https://bopiwode.weebly.com/uploads/1/3/4/3/134367631/1127167.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/rixevozajixezos/lg_optimus_dynamic_ii.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/un_behindertenrechtskonvention_inklusion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2910/1207/files/family_reunion_information_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/6783/3018/files/rawitutetawimefoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0305/8623/files/speech_recognition_applications.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9584/2709/files/kaxiruputubijikibi.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/equations_containing_fractions.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/20292231702.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_off00005980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5980 5612 bytes
SHA-256: cf1599730d212fa7b297b454067942b2c54ebb02296daaf5eb9f0f1986649863
font_01_sfnt_off00006c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C82 9884 bytes
SHA-256: 5cd027a6564f4da857041bef3f8c0d8d620e23b13487d4c4388728be762a419f