Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1813c688bcb6a07…

MALICIOUS

PDF

53.6 KB Created: 2020-11-04 09:07:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 8a42da5241b3964265007e4ba8bf8b02 SHA-1: dca346b34b47c8e369d60bd80a4c28079760faec SHA-256: e1813c688bcb6a0765e52542f9ef0b56a424f03a0594e1cef7869de63ab21d36
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://ttraff.ru/123?keyword=example+of+science+fair+project+abstract 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/f20ae8bb-195f-4e5f-828a-cff6e1b21afc/31533481200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03f5e6df-5405-49b2-935d-38f6ff3a8f69/27907390572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d85d80c6-4c0f-4b1d-a084-b61b3bd0bbbf/penojexatebufiradiladopi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa4787a7-a25b-42d2-92df-8565f75a245a/binatone_juice_extractor_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b69cc44-19cd-4ddd-82ec-951123ffd164/19207056986.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d2504d0-5751-4611-9941-8219863b4b91/danisepur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b09111f-43ff-4901-a2c8-504b6e8a9478/how_to_get_lipstick_out_of_carpet_shannon_lush.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6f4d17e-c5fd-4f3a-8e9c-7129f1fac38b/77348467710.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/3236483509.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adfa2d35-391d-4b95-918f-ad27eafd50c0/lefaxelimo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1ccffae-57cf-47bb-b19b-1fd31c875cd0/74117592631.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08635341-6c93-4fd6-be7a-5351dcc07ee1/59751074721.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000a1c4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA1C4 22736 bytes
SHA-256: 741680589c199660f92ac56e7511115a5fbc827cc26e0c92f574d7db07c35a16
font_00_sfnt_off00006bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BEF 5400 bytes
SHA-256: 537484b73621c6d189104fc5c17fe52dc720c74e19f906c16d0410383b2ffb66
font_01_sfnt_off00007e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E41 10724 bytes
SHA-256: b4bda8291f1f11014ef265428b49b64d293455ed6640a70739fc775b9e4fe0b6

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