Malicious PDF — malware analysis report

Static analysis result for SHA-256 a576e7e7515d351a…

MALICIOUS

PDF

36.0 KB Created: 2020-11-04 09:48:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4c3d5c21c5b66f9564ac5565eb2d11ca SHA-1: d7ab1eefa909a1ffa1513b1353ce5c1c27c89c09 SHA-256: a576e7e7515d351a0950fcf3b2045d9a933ee3e01b31caca48ba8d26a6709cc5
94 Risk Score
Tags
free-cdn-ebook-manual-lure

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://cctraff.ru/aws?keyword=muscles+of+the+arm+quiz In 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/3501e971-b4bf-4a18-9e19-433c0909260d/white_ramus_communicans_and_gray_ramus_communicans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0137ac7-3291-4874-8426-33083947b7f8/47739899423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17eccc80-66b2-47b5-98ab-f62841cb635a/mejisawawulovefubanufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50105915-ac00-4fe4-b0b3-5185e7920c24/bofimokomuxako.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/tovokavukof.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/zedofedugetoz.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/successful_transfer_essay_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/fasotajedag/pg-8x_free_vst.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/wonex.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/atlas_world_map_free_download.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_off00004ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EC3 5304 bytes
SHA-256: edf01a0f4b20a1cb65616ab45d84ca41edf2cb9d4106eb41ead2cd0caf83a54d
font_01_sfnt_off000060bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BC 10376 bytes
SHA-256: 90c942dfbbbca508872c1d74248bdf49cc739d0157c8ad5e0bd6636760fd61d7

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