Malicious PDF — malware analysis report

Static analysis result for SHA-256 62276c7ca3babbca…

MALICIOUS

PDF

94.5 KB Created: 2020-12-18 08:10:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 464f8baabdfc740c0f80624d1d990859 SHA-1: 72cd9320bbcb639552a1e32261652bf6023505ba SHA-256: 62276c7ca3babbca413353bc8a098911c9aa50f5e9f08c183c16cf90d3c8d0c7
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the malicious redirector strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/123?utm_term=earth+with+iron+oxide+water+supply In PDF document text
    • https://tusezewepoxir.weebly.com/uploads/1/3/4/3/134339989/944d0.pdfIn PDF document text
    • https://ribafiligizeki.weebly.com/uploads/1/3/1/4/131438260/e32ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502721/normal_5fbc5d7a4b36a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445544/normal_5fae9703c37f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366347/normal_5fc42e3e51b9c.pdfIn PDF document text
    • https://jipuzalo.weebly.com/uploads/1/3/4/6/134693454/3242177.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf504de18c5c478ef26a8b/1606373453576/wiribewazamudolevu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc144dc68612547ed60a5eb/t/5fc50c1cf3de5e49b5048981/1606749212815/truckee_high_school_master_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d032cd6a-8340-413d-9f3d-6fe8d9d360a3/reguvududixozoluriset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c1e2344-0f0a-4e6d-b3ee-0c84b5f32e42/84211942055.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc68006ab79f442f250112e/t/5fcf655c68c18617d4112ae7/1607427420740/dinosaur_like_triceratops_without_horns.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD1 5148 bytes
SHA-256: 0740757082c2f1342360f5c6ac494502ebaeae6c9f5a57cfc0b2f0eaec9713cf
font_01_sfnt_off00011d62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D62 13152 bytes
SHA-256: 8deb8fe07bd7e5c64025dae6ea576ce191285884243d8ab97d92e657f859a86d
font_02_sfnt_off000149b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149B1 16224 bytes
SHA-256: acf7a06de5d54d5ba0e953f9d946810ccc02efbad1fdc304b178a00b3c54ffe5
font_03_sfnt_off00015ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EF5 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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