Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d517708bc62edd9…

MALICIOUS

PDF

73.8 KB Created: 2021-01-25 13:52:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 09528a6b93228a78fa5f26081e8009a4 SHA-1: f1afbb3ec2ab96c77417a615e9f092d77dacd3ac SHA-256: 7d517708bc62edd97c04750988b50b1c35576e7c706115e517108f9aa2c0616f
156 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious URL, which is likely part of a phishing or scam campaign. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, suggesting an attempt to drive traffic to various sites. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wb?keyword=voice%20recorder%20on%20iphone%20app PDF link annotation
    • https://giduwopevaxotos.weebly.com/uploads/1/3/5/4/135401458/ruzaselusomirezatupi.pdfIn PDF document text
    • https://gowobokibisalo.weebly.com/uploads/1/3/0/9/130969305/wuvunodibaw.pdfIn PDF document text
    • https://nivikaxixigimom.weebly.com/uploads/1/3/5/3/135322477/f8525ad175.pdfIn PDF document text
    • http://limevekobo.iblogger.org/aqa_gcse_physics_hodder_textbook_answers.pdfIn PDF document text
    • https://susafoxepi.weebly.com/uploads/1/3/0/7/130775374/7783764.pdfIn PDF document text
    • https://vewekazetuxif.weebly.com/uploads/1/3/1/3/131379326/tavas_lemijaxosixapi_zofusudelu.pdfIn PDF document text
    • https://kikosezuzo.weebly.com/uploads/1/3/1/3/131378972/6743452.pdfIn PDF document text
    • http://pimebujeben.66ghz.com/vidmate_old_app_free.pdfIn PDF document text
    • https://susominen.weebly.com/uploads/1/3/4/7/134714937/3b74369d.pdfIn PDF document text
    • https://ziwarafe.weebly.com/uploads/1/3/4/3/134306838/52a31f7390fed1c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/sap_bpc_segment_reporting.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/nizovifodiwifi.pdfIn PDF document text
    • http://mujopoweter.rf.gd/adobe_acrobat_distiller_mac_free.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/game_karne_ke_liye_kya_kare.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/43345013977.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/82909389882.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/plant_and_animal_cell_worksheet_6th_grade.pdfIn PDF document text
    • http://vigopul.epizy.com/puwebafo.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_off0000e4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E9 4916 bytes
SHA-256: 002d2242378c07fee8469e02670d6c9d723eccca6d2be265b83b356b0e75317f
font_01_sfnt_off0000f59d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59D 10700 bytes
SHA-256: 0ab06b47bcf585c8a104a72ecd2117fe4cd3c44487558a8ffd0f0253d0baafb8

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