Malicious PDF — malware analysis report

Static analysis result for SHA-256 a40c6e05fb0bf919…

MALICIOUS

PDF

93.5 KB Created: 2021-05-08 22:21:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c9729af4ffa68afc7f2bf33879e657f0 SHA-1: 28db51292a155e630b4def13180dcc9589890555 SHA-256: a40c6e05fb0bf919150919c6a672d323e6d37142982575f69e0ca81314200397
156 Risk Score

Malware Insights

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

The PDF document was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, with one suspicious URL pointing to 'maypoin.ru', suggesting a link farm or redirection scheme. The document's structure and embedded content are consistent with attempts to lure users to malicious 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://maypoin.ru/strik?utm_term=blades+in+the+dark+custom+playbooks PDF link annotation
    • https://zuxogujuwikowe.weebly.com/uploads/1/3/0/9/130969390/591332.pdfIn PDF document text
    • https://jomagikovire.weebly.com/uploads/1/3/1/4/131408086/6f96b.pdfIn PDF document text
    • https://nonufovoda.weebly.com/uploads/1/3/0/7/130775853/tiletopexoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://91506351-5699-48ce-85e7-8e7d071f4e87.filesusr.com/ugd/d775a9_adc366662af548dc8b603e1ddd1f7dee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wanalovum/cyber_crime_reporting_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/11831016998.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/luxawikusodetijetapid.pdfIn PDF document text
    • https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_80eccf65ee0642898fd61c67994558e3.pdf?index=trueIn PDF document text
    • https://02ee9779-94d6-4ec7-959f-c0f99fe19a35.filesusr.com/ugd/cdc607_700e349172124c82b99c4177a339e2f0.pdf?index=trueIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_522b153c1c2544cbb6c5e7f13d9c85fc.pdf?index=trueIn PDF document text
    • https://3b87a2b8-2d13-4e6d-acc4-cbba57692a59.filesusr.com/ugd/50988c_cf18477e99014f1dbbf1c3c25aef1b21.pdf?index=trueIn PDF document text
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_5712202431ea43349e011abdfa69a4c3.pdf?index=trueIn PDF document text
    • https://11627308-8c8f-4f08-99ed-0ad85160907d.filesusr.com/ugd/682d1c_16f181170fca4fa6bfbb956f8cc47300.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/6877579913.pdfIn PDF document text
    • https://6d706a39-1f93-4f1a-9423-caccf7e65e71.filesusr.com/ugd/69f91f_74908b4385a841d498caa0b2ff5d03bc.pdf?index=trueIn PDF document text
    • https://4fdc5cb1-0646-4ed0-9ac1-f9332ff2c333.filesusr.com/ugd/9b9480_4a793d2b1f6147d5b69261aa24cf72d4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kuxegu/98463118686.pdfIn PDF document text
    • https://8acf0fc4-2da8-4686-9788-d7840b5449fc.filesusr.com/ugd/fab691_a37ab67cc62246d8afd607fb4d8af0dc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mukutud/dining_table_autocad_block.pdfIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001189c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189C 5668 bytes
SHA-256: 3bd50740c0e04028a1f082409f450af9d0be857445d5c7f58d5a0df7e05a8a00
font_01_sfnt_off00012bba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBA 11568 bytes
SHA-256: 12b496463863f1f2b64ec48a496cc81f4d369474398b5e514b718f81fee6f1d9
font_02_sfnt_off0001530a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1530A 16232 bytes
SHA-256: 518caaef23ff38dffd173390deb2ebbf4fc7588f1930709da0bf1b0df588cfea

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