Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fba956fd7a64f40…

MALICIOUS

PDF

190.4 KB Created: 2021-03-09 03:58:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cc9c0c96f08819924b225578578f128 SHA-1: 19ce4987b8cbb0b983311fd70598d8d08c8c31e8 SHA-256: 9fba956fd7a64f403e16f127f4729fce8a00191c148c4d70f1821bb64e9a7807
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, suggests a lure related to sports schedules. The presence of external URIs and the overall detection by security tools indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://golowaki.ru/award?keyword=bundesliga+spielplan+18+19+%25C3%25B6sterreich+pdf
    • http://tozofuji.scienceontheweb.net/79444151853.pdf
    • http://fovikoxesaweziz.medianewsonline.com/how_much_time_to_learn_matlab.pdf
    • http://vodabutopidaru.getenjoyment.net/22452756315.pdf
    • https://cdn-cms.f-static.net/uploads/4366044/normal_602d9da64b905.pdf
    • https://cdn-cms.f-static.net/uploads/4502698/normal_6023cd5a7ed58.pdf
    • https://cdn-cms.f-static.net/uploads/4417662/normal_5fdc106b64fa2.pdf
    • http://giftcard-sale.store/88118926343z7fep.pdf
    • https://static.s123-cdn-static.com/uploads/4456369/normal_5ff442be3a6d1.pdf
    • http://lnstagramcopyrightmanagement.com/universal_music_artists_south_africas7ipb.pdf
    • http://zugemenelil.medianewsonline.com/best_nora_roberts_books_series.pdf
    • https://cdn-cms.f-static.net/uploads/4369168/normal_5fe6e9603f5f3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://ba739632-11db-41f7-a023-683a20e55d36.filesusr.com/ugd/99835b_2c4c2e75ca3647039f335f64c4c5061e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c2bea3b8-94af-46ab-8994-16034608aff2/gifafabosoganaselodax.pdf
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_9dbf96ecb1484cdc84574f2bff56c2eb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/67272a95-9fed-4795-b580-dd9bcdab2b7b/how_to_use_serato_lite.pdf
    • https://uploads.strikinglycdn.com/files/0a6d1147-d501-4a07-8a4c-1e6a5b958ea4/troy_bilt_horse_tiller_pto_attachments.pdf
    • https://dca540c6-954d-4243-9f09-0921753db957.filesusr.com/ugd/974a4e_55cdd70aa1d24a64b6fb5febf8a93432.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a73c8156-df09-44d6-ba88-080e7bbd2d2a/wegazuluvububiwasadububum.pdf
    • https://a54de82d-0003-4787-801b-d7ee719c780a.filesusr.com/ugd/8d57bd_6f3c51f0b7e942e5b2afd913b0e20514.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00029084.bin
d3acb672c33a94b169ff3878a72a7c3a4730b9f645f45742823155e41d001495		 pdf-font-stream PDF embedded font (sfnt) at offset 0x29084 5780 bytes
font_01_sfnt_off0002a427.bin
cd46d886f2bb46363205e812f0b6cb4b4a1bb0ba91afeeb60db47134735e7471		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A427 18092 bytes
font_02_sfnt_off0002da82.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DA82 4324 bytes

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