Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d8baebda1465955…

MALICIOUS

PDF

78.4 KB Created: 2021-03-05 10:33:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac996fe375f9962f762873da3fdc6215 SHA-1: def4aa1427d76142dfe64e2def5a1ca8a50160f4 SHA-256: 4d8baebda146595539d82eaea0eb7270a8cf1b1b294b9bcab5436cc91db0c6aa
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that directs users to a phishing page, disguised as a troubleshooting guide for a common internet issue. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest this document is designed to trick users into visiting a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/123?utm_term=why+is+my+comcast+box+blinking+orange
    • https://cdn-cms.f-static.net/uploads/4493578/normal_603677f7f0011.pdf
    • https://cdn.sqhk.co/peluxisomex/d4jfjgz/3967032863.pdf
    • https://cdn.sqhk.co/detaludolef/higXkab/ruzanunateza.pdf
    • https://cdn.sqhk.co/weteroliwo/hagdxm2/my_talking_tom_love_angela_download.pdf
    • http://bulakirip.getenjoyment.net/a_static_budget_is_appropriate_for.pdf
    • https://static.s123-cdn-static.com/uploads/4369318/normal_5ffa4ce24dc3e.pdf
    • https://cdn-cms.f-static.net/uploads/4369760/normal_5fdaf53a3e62c.pdf
    • https://cdn.sqhk.co/zovitamojim/uhcIeCc/gelish_nail_designs_for_short_nails.pdf
    • http://gukiduwonaxinef.getenjoyment.net/easywriter_7th_edition_barnes_and_noble.pdf
    • https://cdn.sqhk.co/salefudodid/ggcZ7hg/zombie_origins_walkthrough.pdf
    • https://static.s123-cdn-static.com/uploads/4450517/normal_5fee749b50457.pdf
    • http://luwinilulurop.mywebcommunity.org/4832979121.pdf
    • https://cdn-cms.f-static.net/uploads/4414701/normal_60240c348f16a.pdf
    • https://static.s123-cdn-static.com/uploads/4390374/normal_5ffe71fe418c5.pdf
    • https://cdn-cms.f-static.net/uploads/4459774/normal_601b609d2bf84.pdf
    • http://tejovotemikodes.getenjoyment.net/batux.pdf
    • https://cdn-cms.f-static.net/uploads/4485589/normal_602626784ee6e.pdf
    • http://kifopelidito.mypressonline.com/john_deere_455_aws_specs.pdf
    • https://static.s123-cdn-static.com/uploads/4480580/normal_5fe3e6d36e7d3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xowilewegiwo.myartsonline.com/fulubujidi.pdf
    • https://uploads.strikinglycdn.com/files/8575cf0d-d7fe-4502-94e2-93f347cf4ca0/zojirushi_water_boiler.pdf
    • https://uploads.strikinglycdn.com/files/28b312cc-fb7a-4869-9ade-8083e0c1b7c7/61878529496.pdf
    • http://vunonam.atwebpages.com/how_to_install_a_spalding_inground_basketball_hoop.pdf
    • https://uploads.strikinglycdn.com/files/f33fb00b-69f7-4ee8-86d6-d41cf5b613fb/kirotebikusukakedo.pdf
    • https://uploads.strikinglycdn.com/files/d73a54cb-e9a8-457b-81c4-de46c3a8f5c6/why_did_europe_change_after_ww1.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f598.bin
90bd56254f1c0e16f8c5f3064ff4c3381d02289e7a5025149bd695e80f656028		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF598 5600 bytes
font_01_sfnt_off00010893.bin
d382c652862516d73b6f0664d176a76ce7592ab1f4b847b3a8085ae97094990a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10893 10436 bytes

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