Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe42bd6f8a07304b…

MALICIOUS

PDF

69.1 KB Created: 2020-11-05 01:32:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b317b1dc9f0fac1ca93d82f5507d1eef SHA-1: eb16d925a0158bf0c2b69fa743454c8d825f1d22 SHA-256: fe42bd6f8a07304b39f20119e5a5185a964783c7d3d1e6ad5e2bece2677369f5
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains URLs that are also flagged as potentially malicious or part of a link farm. This suggests an attempt to direct users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ttraff.cc/123?keyword=ethics+for+the+information+age+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4407102/normal_5f9fc7f58831f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459624/normal_5fa2bd49e40fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413697/normal_5fa0db97c5ecc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370284/normal_5f93ee0574297.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/6d24df30-1e42-4b12-8035-5ecf3d89dc05/59424894843.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/ticketmaster_service_fee_waiver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92129989-88f4-4de6-ac92-c81821cff1d8/88427002828.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa038784-32dc-48a7-af42-c8a64bd82657/zivezagovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d41b260d-7f5f-43bb-81fc-c86ac40f1019/vakanililudakopu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6868/5464/files/game_sandbox_android_terbaik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf7dbc74-9f08-41fa-bb67-be410d30d7d4/traktor_pro_2_download_32_bit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/8403/5262/files/dp_ultra_gympac_assembly_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26d74eec-ce54-4326-aabf-563ec220f9f3/75153854975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2731a64-9d64-48ec-bf2f-1115babe4a0e/87116024179.pdfIn PDF document text
    • https://s3.amazonaws.com/kidugodofunose/speech_in_the_virginia_convention.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db1bdc97-c2bd-4f17-804c-96c6c16d21ef/tools_of_geometry_unit_2_test_answers_part_2.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000991c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x991C 9256 bytes
SHA-256: 7be8a8958eef76c3fd31fb19fff152e96224c74a0e8ca3fdfaa9342b509332f7
font_01_sfnt_off0000b7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7C2 5496 bytes
SHA-256: 2feb27d568b8e11d3ecb48a8f8bf046e32d856620f0e3e9e2c20d0303031cd8a
font_02_sfnt_off0000ca4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA4B 10796 bytes
SHA-256: e6beb00910a59d3e2eb601f8784b154b27c56aa69fa68dc16fa5657b89115495
font_03_sfnt_off0000ef39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF39 16060 bytes
SHA-256: 9fce2e558c7eba93e9b4ba87b790c422cf9490aab73fe875614431ac3e7f116a

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