Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e8ed20bc8909fd3…

MALICIOUS

PDF

71.1 KB Created: 2020-11-10 22:47:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e91b7492015b3ed5ae460b2d7c63523f SHA-1: 13f0a7dbde5147fbf5d2d7da6953e5e48049dbd6 SHA-256: 3e8ed20bc8909fd320d640b2624a66e123c97c1da48ee82c9594b81f43425fa2
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent, likely to redirect users to phishing or malware-hosting sites. No scripts were extracted, but the embedded links are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ggtraff.ru/123?keyword=gun+mayhem+redux+fun+unblocked In PDF document text
    • https://bizavurodetilu.weebly.com/uploads/1/3/4/3/134391156/giparoginimar.pdfIn PDF document text
    • https://kolapudavuvoxe.weebly.com/uploads/1/3/4/3/134315715/xuwala-manan-zajalorad-pemofamaxurel.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/f3c6b098-0723-4c6c-8118-2c600bacf1a5/tilakuzobusuku.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/home_depot_manual_tile_cutter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db3f4a19-6c7e-45a8-a677-422f643dff83/uw_health_partners_watertown_wi.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/advanced_english_dictionary_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef9dda36-3aa4-4927-8a80-f58edd789891/mount_and_blade_warband_crack_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f83ea15c-957a-43fc-969e-14c9079b98ff/64031441199.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/crusader_guide_ragnarok_mobile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46e4e412-3d16-4d1e-93f0-07c7413f0118/92422837863.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/43494524397.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/mahendra_st_portal_st.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a078fbaf-816d-4629-8c58-039c3e7d10d3/kegesobalim.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_off0000d400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD400 5488 bytes
SHA-256: fed77afdb03e5689a04466b59a7e09d6a0698aadae2f92bd21fa690bd6bc2120
font_01_sfnt_off0000e692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE692 12940 bytes
SHA-256: 8196d4f4e4c5bbf6ce7e0a59635d91936388b8488c486bd646a8678af832a9b3

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