Malicious PDF — malware analysis report

Static analysis result for SHA-256 d84e8493d94e4886…

MALICIOUS

PDF

36.8 KB Created: 2020-10-30 18:53:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96fd20d3b7558520edf08e3231966a7a SHA-1: 127e8bd86f8fe64d21eb58b17303c70098aae555 SHA-256: d84e8493d94e4886682fcf3f4b21bc5738a6d38ba47c5a640ac61e7bf9417b8a
94 Risk Score

Malware Insights

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

The PDF contains a 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 is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

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.com/123?keyword=does+fossilized+dinosaur+poop+look+like
    • https://katubebadidi.weebly.com/uploads/1/3/4/4/134474785/e31679b.pdf
    • https://dosedupuwosiwoz.weebly.com/uploads/1/3/0/7/130776272/sujematovo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/miwolezedubujoz/puwenago.pdf
    • https://uploads.strikinglycdn.com/files/1faf4cfe-6400-4697-9ade-3c7c71902934/64576059635.pdf
    • https://uploads.strikinglycdn.com/files/a8524d64-62e6-4e57-baaf-6d1d0836804d/wepenaturelejawake.pdf
    • https://uploads.strikinglycdn.com/files/636d4492-6e04-4f67-b645-88a4f3a67869/esl_directions_worksheets.pdf
    • https://s3.amazonaws.com/rozebofukixus/neem_oil_lowest_price_in_india.pdf
    • https://uploads.strikinglycdn.com/files/30e32c5e-ea33-4851-8def-ef7dac564fdd/bekufonitedeginevu.pdf
    • https://cdn.shopify.com/s/files/1/0476/5250/3718/files/unc_charlotte_baseball_stadium.pdf
    • https://s3.amazonaws.com/henghuili-files2/telebuk.pdf
    • https://uploads.strikinglycdn.com/files/9fe5a606-a973-4249-ba23-c60f8ac8c05c/19338613102.pdf
    • https://uploads.strikinglycdn.com/files/bea497a2-5a6a-47ba-abf1-2ab06174a0a6/gozanemuzeg.pdf
    • https://s3.amazonaws.com/nemafu/pdf_editor_rotate_pages_online.pdf
    • https://s3.amazonaws.com/subud/bhagavad_gita_chapter_14_in_hindi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f68.bin
e386e7b1aaf5b66315e88e070643d2ccdc9710809acba4bd05a8c9d534788cbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F68 5148 bytes
font_01_sfnt_off00006109.bin
617bc946e5dc9f5a8a37746efc7882d995b23fdd8adfef346605391705896778		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6109 11016 bytes

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