Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ec95b8aa5018a17…

MALICIOUS

PDF

46.6 KB Created: 2020-11-02 05:21:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 11b4b3d795333745ec1b453ccbc0bf9c SHA-1: 1cf03bbe375cce39f21c05b13e82544bf7dae047 SHA-256: 2ec95b8aa5018a17c0d0d8806c2d32110ab329597d00cd986ee326f642ea2551
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The document body, though heavily obfuscated, contains the URL which is likely intended to be clicked. The ML classifier also flagged this PDF as malicious with high confidence.

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=reification+fallacy+definition In PDF document text
    • https://tisatazufewuvo.weebly.com/uploads/1/3/1/1/131163687/60339226.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419194/normal_5f9e85289a8e1.pdfIn PDF document text
    • https://vagonegasix.weebly.com/uploads/1/3/1/4/131482995/kivaperemalo_rosorajuw_tunakusexaxixes_lobopexe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tetazino/chuy_s_nutrition_facts.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/what_does_hyung_means_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/20951372504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e846fdc1-4125-4a30-b4da-716862b63ac4/demudodadataguf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3637/9816/files/99968220290.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/enterobacteriaceae_species.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8631/3151/files/incremental_theory_public_policy.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/rageruwanupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2795/3328/files/pioneer_avh-p2300dvd_wiring_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/7809/6296/files/cyberpunk_2020_gry_online.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E83 2960 bytes
SHA-256: 3c6502e04658d985b37ed967139d4b1bb7136c1c8ff06868e6b64c17630b7d50
font_01_sfnt_off00007906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7906 4852 bytes
SHA-256: 15ab3851773f3b4d47bf13d01955998e777954d1d68c59ae1b00ade3953f8df0
font_02_sfnt_off000089b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B3 10416 bytes
SHA-256: 4748e79fe969d414dd149cefccc1194aa86dd2d73ac941d0febd16eeb7b081bf

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