Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe1cb8f2f5ba314…

MALICIOUS

PDF

86.4 KB Created: 2021-03-18 06:17:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3d63af23be0bf3c9879c538fd04e65fd SHA-1: 9ce2f785cb39fded57bad024dd64212bf67fd572 SHA-256: afe1cb8f2f5ba31434a3b3761f37156cee14c2db0e2eb24402c5046a2ce8f048
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://druttle.ru/wix?keyword=gopro+hero+session+user+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450338/normal_5fd816ba2e543.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409992/normal_5fcbe56b56bed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474720/normal_5fe55ef04aa06.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/how_much_is_carlton_cole_worth.pdfIn PDF document text
    • https://cdn.sqhk.co/mumepefofise/ipjhrif/lafumuzedokevisi.pdfIn PDF document text
    • https://cdn.sqhk.co/merabuvi/hPIghKv/mega_mall_story_2_apk.pdfIn PDF document text
    • http://xoroketogejuxe.mywebcommunity.org/bacterial_transformation_lab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390373/normal_5fdb138d75f27.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_419a3f6b24594854b300e32e4d123e1f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dudurat/bodyweight_fitness.pdfIn PDF document text
    • https://07f52280-50dc-49c2-beec-a2e30bf849d0.filesusr.com/ugd/7b8f90_098488b5961a4b59abd43ddd59debe11.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wajibile/37852700479.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/ccie_collaboration_written_study_guide.pdfIn PDF document text
    • https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_5917e38a260847489e4bf8fb1c521990.pdf?index=trueIn PDF document text
    • https://28f2c00a-638b-45ec-8848-4d649cb6aba9.filesusr.com/ugd/946f28_dccc142798fe433680854750cd413033.pdf?index=trueIn PDF document text
    • https://6e37e838-c278-4d46-baa9-25b8497af200.filesusr.com/ugd/fbcb80_d5cc24ee55d447468b8c96f0e3c4e40f.pdf?index=trueIn PDF document text
    • http://xobibaga.myartsonline.com/section_3._1_the_rock_cycle.pdfIn PDF document text
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_6dd5caf519274127ae4aea4d02d70f3c.pdf?index=trueIn PDF document text
    • https://63c5840e-267c-49ed-94d3-fc9f9d8b9c0b.filesusr.com/ugd/8c5bc8_85e6c96658844285903e4ba196ebe4cd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tosego/59967075754.pdfIn PDF document text
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_ae4839cc5efa4013ac8b91f93d2f4b62.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_off0001164f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1164F 5088 bytes
SHA-256: 7bd39345c10a9d0851dc225e4346ca84af02f26857c89586e6989fbeb42f5700
font_01_sfnt_off0001276f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1276F 10876 bytes
SHA-256: c68efadf81de9777fee6a664def0a85cb9f633dfc459fe7ee612351646aeaf80

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