Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5d51c7290b4f321…

MALICIOUS

PDF

46.1 KB Created: 2020-10-05 02:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e340892fc6c691eb8721e6223c072b07 SHA-1: 676b9bf1d1c8cdc32fc03061bf285792ef07be34 SHA-256: b5d51c7290b4f321c190786d9e60d279be0e0e4700d9193f462796fa0b3b064e
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, indicating an attempt to lead the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or malware distribution.

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/strik?keyword=partition+coefficient+of+benzoic+acid+lab+report In PDF document text
    • http://putalu.thecottageatcedarburg.com/uploads/1/3/1/0/131070792/8656048.pdfIn PDF document text
    • http://files.thisandthatspiritchat.com/uploads/1/3/1/4/131437583/wubuf-dodibiwik-rilonum-vibenajos.pdfIn PDF document text
    • https://site-1042765.mozfiles.com/files/1042765/janimuresav.pdfIn PDF document text
    • https://site-1040288.mozfiles.com/files/1040288/jotem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7482/8953/files/earthsiege_2_controls.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7111/8235/files/wow_vanilla_argent_dawn_rep_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6251/6122/files/22257653690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6550/6966/files/85814041603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/697cd10e-ec03-4d68-a962-5201269ddcdf/pokenivamaxezafoxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3f647e1-4ce6-452e-a4ca-3a6975c34ca8/wiburudojezenasomadedoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4106164-17ba-4f56-9b45-efc0c224ad9f/zamunelozolatusupojuta.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_off00006f55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F55 5160 bytes
SHA-256: e557a68d8262b8e1921d2a59ad53f00f3a63907c58bd5f7839ee89661e1b8100
font_01_sfnt_off000080f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80F9 13300 bytes
SHA-256: 54efaf16e97889015b122d66a339f892547bb5eaccf29d807087e13dc6c2201e