Malicious PDF — malware analysis report

Static analysis result for SHA-256 010746249a7df414…

MALICIOUS

PDF

65.7 KB Created: 2020-11-24 09:06:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 48f25dcc3538b32519916dfbb2144fc7 SHA-1: de7e0994e6b2b88583b26f3b1233c81565f3701b SHA-256: 010746249a7df414d9ed42305cecec0f9e7d005dc7463c57ea4907fb84aad20c
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 0.9979

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://traffnew.ru/123?utm_term=bank+of+america+profit+and+loss+statement+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452587/normal_5fab75c5608fb.pdfIn PDF document text
    • https://duverovimuvojap.weebly.com/uploads/1/3/4/1/134131352/lowifakizalil.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/87f1f5d8-1e1f-485f-86cb-72c3d42a0b49/97649849560.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7c64d7d-bbd0-4f9f-8d97-3d1fb0c47b75/mitepoposevun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20836980-c76b-4cf7-8be4-abebea35f4a7/hymn_story_of_he_giveth_more_grace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3b5024a-ffe5-4a9f-ba10-c3c2ae186544/forgotten_realms_underdark.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/angularjs_example_application.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dca8ad4d-0c0c-427f-8653-20d2b4bd35a5/penafominug.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/caudal_regression_syndrome_how_do_they_poop.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3D8 5416 bytes
SHA-256: 60a6785fc63815838f5a938721a971507d7affc0b8e2e2934d511f6b823db854
font_01_sfnt_off0000d634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD634 10664 bytes
SHA-256: b33ca3f7611de6837eb7c013f5a58f6ed854ad042f8a5509d74ab0e6ae41c32b