Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d6baf57367e6dc7…

MALICIOUS

PDF

77.6 KB Created: 2021-03-15 17:32:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c49bf3b2dde75ba6c8f67a9118a31370 SHA-1: 70eda441eb522da3de827ee2a987b1722f7b6b7c SHA-256: 9d6baf57367e6dc7a95134eab85780686b01e23a106341b4ec85816042014daa
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The primary malicious URL, 'https://jumiwimov.ru/wix?keyword=grants+high+school+grants+new+mexico', suggests a phishing or scam attempt by using keywords to appear relevant. ClamAV detection and ML classification further support its malicious nature, indicating it's likely a phishing document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jumiwimov.ru/wix?keyword=grants+high+school+grants+new+mexico
    • http://sokfresh.fun/zabuwo29nqe.pdf
    • https://cdn.sqhk.co/begokaxawip/gdLNjfa/super_mechs_download_hack.pdf
    • https://cdn.sqhk.co/mujawiru/gZ0gc3z/bake-_it-_easy_pty_ltd_cape_town.pdf
    • http://dojegegitotebe.22web.org/safety_data_sheets_for_paint.pdf
    • https://cdn.sqhk.co/xixofivib/jaIgdzr/pupilpath_teacher_login.pdf
    • https://cdn.sqhk.co/fekigimuzib/2Pa3icX/redsun_rts_premium_full_apk.pdf
    • http://trycabinets.xyz/patotonojodebaxskmd.pdf
    • https://cdn.sqhk.co/xosifusozat/rigjj6v/samsung_s9_split_screen_android_9.pdf
    • http://itchia.space/fakogukekagopalevu84dnv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://336ddc11-c37d-4cd6-9685-7accad2975f7.filesusr.com/ugd/479fa9_82323e5510a7473eb3ce5d34fa9a34d4.pdf?index=true
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_b9c6eb52f8a041b9b622a274b7b1c82e.pdf?index=true
    • https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_a84f24aea46d40b79befdd0cc83fccee.pdf?index=true
    • https://72b50e20-f79f-40ca-96b4-24bef83e308f.filesusr.com/ugd/1a1092_bbeccfea7018430c81127a7d30dc0c44.pdf?index=true
    • https://6bc61794-ec17-45f1-96eb-8bed4cd57308.filesusr.com/ugd/217b8a_9481a015736a47608dd82e93cc17549f.pdf?index=true
    • http://matujuluji.epizy.com/sharp_air_conditioner_12000_btu_manual.pdf
    • https://uploads.strikinglycdn.com/files/2f20f2f3-f812-4a1e-b4d8-9403de1d291e/75199199226.pdf
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_a7bb34e8e9074107b6132b736c08e782.pdf?index=true
    • https://c8f0d892-4c73-447a-841b-b6a48a565a7d.filesusr.com/ugd/928a57_c4a633a4d73a4f8e92bd447a36f14127.pdf?index=true
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_e37953b13ba046f49face058825ac69f.pdf?index=true
    • http://juxaluvopo.epizy.com/myiasis_flies.pdf
    • https://9b704b87-3668-414c-a24e-b30400fe0e33.filesusr.com/ugd/51c472_6458d0ddaba243d1a86bd5683c19d967.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2ea58b11-4b5f-4052-abcb-45dc12b50660/namoribisoruponosob.pdf
    • https://704d67de-a0ba-412a-a77d-f8c4cf0d88a3.filesusr.com/ugd/a83d94_71628b637be94740b5ee6410b0d4a3c7.pdf?index=true
    • http://wumevejuraluxe.rf.gd/79317645452.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_off0000f27c.bin
190c37fa65c365219b70812984f3f4a7ba76f81bec65de75ba47afdb264a5f7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF27C 5404 bytes
font_01_sfnt_off000104ca.bin
796ab58cf1dede02b6d745a6d89bbf3cc8d3f00b4589ca589e2dfc420a1ae30a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104CA 10468 bytes

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