Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f58c98c07825e9…

MALICIOUS

PDF

42.6 KB Created: 2020-10-01 16:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: efd20bc993581003aea5c788cf0fea30 SHA-1: e79fef93c9c6b396577c61e86207e18d7d172100 SHA-256: 56f58c98c07825e94f64a8674fc1838d76bbfb4edac70012f8b4cd3491482e49
94 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains a link to known malicious redirector infrastructure. The embedded URL, https://cctraff.ru/strik?keyword=narasimham+committee+on+banking+sector+reforms+1991+pdf, is the primary indicator of malicious intent, likely leading to further malware delivery or phishing. No scripts were extracted, but the presence of a malicious URL in a PDF strongly suggests an attempt to lure the user into clicking it, likely as part of a spearphishing campaign.

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=narasimham+committee+on+banking+sector+reforms+1991+pdf In PDF document text
    • http://wisakuju.zbfc.org/uploads/1/3/0/8/130874050/fukadifefole_sowigamele_mudonoxujisar.pdfIn PDF document text
    • http://zalosase.thechangemanagementnetwork.com/uploads/1/3/1/3/131384778/f6085f81d09eddb.pdfIn PDF document text
    • http://files.zuriscollections.com/uploads/1/3/2/7/132712040/besotamudeg-visoxodare-potupupegumava.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/26ac51fe-8001-466a-a4c7-f0352bbe642b/98671933056.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e8fd17a-8557-4a9a-94b9-41d7a7ec0888/54318125548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a057457-f9db-4646-adce-94c0925c5f24/17736198313.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5626/5376/files/61026194103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0038/3646/files/hamilton_beach_toastation_22708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/0423/6700/files/gta_android_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1089/1682/files/honeywell_hcm_350_manual.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_off00005a93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A93 5708 bytes
SHA-256: 442f686508194f6004586b779d529093adb27a8b8ebd7edd3b4990d733dd51b2
font_01_sfnt_off00006dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD7 9804 bytes
SHA-256: b375c55c3b3a1571f3b8eec6b4b154f517929585aa0f255aed472679cc323ec3
font_02_sfnt_off00008f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F67 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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