Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae3a185914ab9842…

MALICIOUS

PDF

77.5 KB Created: 2021-03-13 22:51:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 58b3d0794afedb1779890688ba472893 SHA-1: 13ddc32640a1e33c1c71e2f8890a94d815e3eb28 SHA-256: ae3a185914ab9842046ce300b5aec47ffcd6f551bf9e8553359ac1281ed23fca
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a significant number of external links, with one pointing to 'resalured.ru', suggesting a phishing or SEO spam campaign. The PDF structure and embedded content are consistent with techniques used to distribute malicious links or redirect users to compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://resalured.ru/wix?keyword=arp+request+frame PDF link annotation
    • https://wuxinaruniluxod.weebly.com/uploads/1/3/4/8/134882591/sotafakibejomilebaku.pdfIn PDF document text
    • https://vorapitejure.weebly.com/uploads/1/3/4/6/134605364/siwufome.pdfIn PDF document text
    • https://satalediveli.weebly.com/uploads/1/3/4/0/134018026/2475099.pdfIn PDF document text
    • https://tupumerar.weebly.com/uploads/1/3/2/6/132695397/zeduzisufoku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wifukedot/kugamamafuf.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/modibeladusun.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/9755172279.pdfIn PDF document text
    • https://91953a53-6f32-4f2a-9b2e-0f954541ff31.filesusr.com/ugd/dad90e_0054203e017d45298abe496eb8c5ef45.pdf?index=trueIn PDF document text
    • https://aa514bbb-a96e-4bc9-8ff3-0ca2edd1104f.filesusr.com/ugd/3fc21f_bc2c096f0fa64aeeab310b0b94c0c1ea.pdf?index=trueIn PDF document text
    • https://e8e87dc5-637d-47ba-9de6-e7d98d123d78.filesusr.com/ugd/a69a03_89b12dfb544c48948b7450964f26573b.pdf?index=trueIn PDF document text
    • https://feedbc21-cb93-402c-9ae2-3476589645d2.filesusr.com/ugd/f3ecbe_3f9aad89981f47a4b73a1ab32dcccac8.pdf?index=trueIn PDF document text
    • https://8641c524-1fb5-4292-87ed-dd72f64d6c22.filesusr.com/ugd/9b7d8a_17446f1ef451466abad3d14550d1cd10.pdf?index=trueIn PDF document text
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_8ba3300c4fa74ef285e297e16bdb7722.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/cisco_firepower_ngfw_virtual_datasheet.pdfIn PDF document text
    • https://9df6e0af-a028-4e88-91ba-61a1b37318d5.filesusr.com/ugd/7c1f05_92393962ddf748d49b534f27060df3b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xajowu/trinomial_factoring_worksheet.pdfIn PDF document text
    • https://0298dc5a-7924-4276-8279-06452a5288da.filesusr.com/ugd/b30cf0_c7ac6196c5e84f1498bc50dced923f75.pdf?index=trueIn PDF document text
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_3cbf38c7853740329eb59e6b410fbac8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/stop_bullying_worksheets.pdfIn PDF document text
    • https://0f285ee0-1b14-49a2-8a3e-060a2db94812.filesusr.com/ugd/4bf67f_82459fbd762847338f145f05e993880a.pdf?index=trueIn 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_off0000f37a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37A 5128 bytes
SHA-256: 8063d61131ab78f967489ebab50542bf6cc1f089884269ab5a42302d0c160039
font_01_sfnt_off000104e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E1 10620 bytes
SHA-256: ea19692a46161028af3b716174adb8d8d304a343409ce8823bf30d546d523606

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