Malicious PDF — malware analysis report

Static analysis result for SHA-256 1390f6ba14660ba5…

MALICIOUS

PDF

97.2 KB Created: 2020-12-03 17:24:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7b7d9b636358a841cfcb9da809f24ddb SHA-1: 11b7a77d416f9a691916bc8457568fac091d569b SHA-256: 1390f6ba14660ba5ef305c7e9edef9d07f61ece9d0828c0f68f4a38ceeb4e37c
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 0.9991

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://trafficel.ru/strik?utm_term=map+of+aztec+empire PDF link annotation
    • https://nolujamikudaze.weebly.com/uploads/1/3/4/8/134868466/zesopaxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370304/normal_5f98fae10022c.pdfIn PDF document text
    • https://palidabelegofa.weebly.com/uploads/1/3/4/3/134316445/2162548.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_5f8cea36b2b49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421468/normal_5fabc072741a0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ff0943d-ceed-4a03-8131-4e13e947618d/koxeki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdfe2025-6901-488f-80bf-7c419dc2e02b/vilolipopokimiwunofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7d3b0a7-23d5-436d-b262-75b06d1e3b8c/zereg.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf492afa04221c7116684d/1606371627449/bojobuzaxopawonug.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf67013570fb44d1faded6/1606379266500/60561184410.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d49a16f6d44b07be6b5d/t/5fc4ce384e98326c02a85e28/1606733368837/43303173382.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe27f89ee0f32b871d3cb3/1606297592691/futemutafanakedawolelezo.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off00013cad.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13CAD 31292 bytes
SHA-256: 4f22d0578617058eb49a63aeae5e3f26c3cdbb2613f20b39ab3bb68a4ddaba05
font_00_sfnt_off0000d745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD745 5092 bytes
SHA-256: 76c17fb9dffab9ee048efcfefbdcbaa694772e043def468f2d8b5f6f65d8cb1f
font_01_sfnt_off0000e927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE927 5004 bytes
SHA-256: c187f0f012f7e18386093d051eb94a6d04a18dcb0c73e6e8fc8ac6ddfd016092
font_02_sfnt_off0000fa31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA31 3752 bytes
SHA-256: c5520229310e51cc166ba219ea7dc200231e72726cf13eed2038ce0ae665f041
font_03_sfnt_off0001085e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085E 17924 bytes
SHA-256: 2738d3c544d281014be3e0e9f21ee6e7a76b07e8e92f2b3170491fa169c281ed

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