Malicious PDF — malware analysis report

Static analysis result for SHA-256 1308db78d7b37210…

MALICIOUS

PDF

74.5 KB Created: 2021-03-14 15:14:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5a0e428e626600985fd73f9b663ad47c SHA-1: 2bc1022f5a42f2eb803812b63a6e957276e293ac SHA-256: 1308db78d7b37210a4d16eb2ef47a3b92604a481a9566b1f08dd5486877c44a7
156 Risk Score

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 0.9998

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://golowaki.ru/wix?keyword=anker+soundbuds+surge+manual PDF link annotation
    • http://romeita.fun/fletcher_building_ltd_annual_report_20165x4mn.pdfIn PDF document text
    • http://joxitikoki.getenjoyment.net/paralonikalawugezekufe.pdfIn PDF document text
    • http://legionmone.xyz/70634041898jvh7g.pdfIn PDF document text
    • http://whysmall.space/370409234495xhew.pdfIn PDF document text
    • http://xutifufaxe.mypressonline.com/10598676871.pdfIn PDF document text
    • http://bidizujimon.getenjoyment.net/42330636278.pdfIn PDF document text
    • http://pay-order.info/nomavupugenaxunazoxeb8qe5.pdfIn PDF document text
    • http://fresh-ita.space/kinodavuwenerenixukedosgnfrl.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/bokelur/81295051765.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/godowasadozukidiki.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/52798352739.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/26383308691.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/fovuboboxivepavevu.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/bhai_balwinder_singh_ji_rangila_shabad.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/1659630930.pdfIn PDF document text
    • http://madigekole.onlinewebshop.net/71754304466.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/66514310679.pdfIn PDF document text
    • https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_bb7047a6b1e242a8a7f614cec5d017a7.pdf?index=trueIn PDF document text
    • https://9d349da1-218b-4b59-9e37-2a90cab56d40.filesusr.com/ugd/de9003_514f065ced114698b3ee0522a25bb2cd.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_off0000e5e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E6 5336 bytes
SHA-256: 0553d5e61bb72828632450b36bc3ebf11ae6b956d31c1871b8bfbd6f1a220701
font_01_sfnt_off0000f7f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F7 10392 bytes
SHA-256: 9d25988e4f5028bdecd6731257ee4840f068ad821dcac7b6ea39d4bf137b6d6d

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