Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce3b5d6017afdd4…

MALICIOUS

PDF

41.2 KB Created: 2020-11-06 15:01:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e6eb1a45f69bc58ee0480cc5d9726f8d SHA-1: 97c65eae190879f8715443a2bb3abdd91a620220 SHA-256: 0ce3b5d6017afdd40b2fa098db9ee1870d7bc855efe8c6661cfcc9d347ad5b16
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 1.0000

Heuristics 4

  • 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://traffset.ru/123?keyword=minecraft+null+mod PDF link annotation
    • https://kogatakuzomaw.weebly.com/uploads/1/3/4/4/134444425/xazewokaxe.pdfIn PDF document text
    • https://kotidirexi.weebly.com/uploads/1/3/4/3/134358756/ef416a0cd7e66.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f6322c7-6f65-4183-a822-2fd7de847b32/60932084743.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/best_reader_for_ipad_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/49688712016.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/86024302219.pdfIn PDF document text
    • https://s3.amazonaws.com/xedobox/modeling_with_arithmetic_sequences_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/dotixafesenutekov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7aa79e8-2886-4b6b-9134-de2b7e6d1abd/ap_gov_chapter_12_the_presidency_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/mass_to_mass_practice_problems_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/famotodemizekoguro.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_off00004dda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DDA 4992 bytes
SHA-256: 60c5f506d603752cd77746633b53d92b6ee9eb348b0e203dec327fff41277429
font_01_sfnt_off00005ecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECC 10220 bytes
SHA-256: 3c6908cb59ffe96ce7e609653cf4897c929a0c814407216d220791c84fdc03ef
font_02_sfnt_off00008226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8226 16064 bytes
SHA-256: 6f41d85279102efce3c4bd26fddb767baf9b68a4f55e239fba9bedc2a2d3b953