Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0457d1ca4ab28be…

MALICIOUS

PDF

83.5 KB Created: 2020-12-08 23:52:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 2cbff32f95c8a2b3a0a1a401c028eb5b SHA-1: ed3d32bfaf74e3a7bf0ce7f12e84e751e0df3e1e SHA-256: d0457d1ca4ab28beabaa357c30db32566db2145c141276a4bc4b8704645847b5
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. One of the primary URLs, 'https://traffnew.ru/123?utm_term=yosuke+social+link+romance', is flagged as suspicious. The ML_NYX_PDF_MALICIOUS and ClamAV detections further support its malicious nature. Although no scripts were explicitly extracted, the structure and heuristics point towards a malicious PDF designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=yosuke+social+link+romance PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369779/normal_5f87fd66d1dc2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446287/normal_5fcb8ed476980.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379736/normal_5f9aad61c2778.pdfIn PDF document text
    • https://naketutetan.weebly.com/uploads/1/3/4/6/134660231/duguzakeporus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443624/normal_5fa67151a169f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391327/normal_5fab51fb1f6fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471455/normal_5faa817e062cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387235/normal_5fcc9a28d28bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380528/normal_5fc92db6ed722.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://s3.amazonaws.com/xovajukoxin/39447797502.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/free_fillable_acord_form_140.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd3cd46e7cdf75b9345dea/1606237399173/circle_theorem_proofs_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/automator_mac_to_word.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/free_virology_books.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_off0000e6f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F1 4772 bytes
SHA-256: 4f66c88a0cfec4dd72cf4222ec63a7d20b05f7289e6d5336828a02ea0c7f5698
font_01_sfnt_off0000f6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FD 11204 bytes
SHA-256: 06e0a5c832873f1a6d85b935fb7279848e8d6aa71b2d784bd7c5474d1e46185b
font_02_sfnt_off00011d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D46 16332 bytes
SHA-256: 91c92fab729f552433758475f1ecf6a366c66c74ae6b4dd9e31a9a0100f2b42c
font_03_sfnt_off000132e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132E3 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

Open this report in the interactive analyzer, or submit your own file for analysis.