Malicious PDF — malware analysis report

Static analysis result for SHA-256 712784c534459b94…

MALICIOUS

PDF

77.8 KB Created: 2021-01-12 16:16:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 66fbf8ea9f8d8310e4ca1b9ffa5a5bf7 SHA-1: 709a34c08c52c79803aa3208e62fe72ba37b30fc SHA-256: 712784c534459b945e274f3bc6723dfef414c14906d200e6cf26730772167e25
66 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm designed to redirect users to external websites, with one prominent URL being 'https://traffset.ru/aws?utm_term=lsat+preptest+81+answers'. The ML classifier strongly flagged this PDF as malicious. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to direct users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?utm_term=lsat+preptest+81+answers PDF link annotation
    • https://site-1177444.mozfiles.com/files/1177444/happy_meal_apple_juice.pdfIn PDF document text
    • https://wixurawitubeza.weebly.com/uploads/1/3/4/3/134319602/wodanudu_gunedexemeboro_tamigeta.pdfIn PDF document text
    • https://site-1168324.mozfiles.com/files/1168324/how_to_beat_roller_splat_level_55.pdfIn PDF document text
    • https://site-1226757.mozfiles.com/files/1226757/android_appcompat_actionbar_icon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485579/normal_5fe61d7f73c9d.pdfIn PDF document text
    • https://site-1175762.mozfiles.com/files/1175762/soar_plasma_trickshot_course_code.pdfIn PDF document text
    • https://site-1175480.mozfiles.com/files/1175480/38632932538.pdfIn PDF document text
    • https://pedudevapo.weebly.com/uploads/1/3/4/7/134719514/62822f3e01f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388282/normal_5f9cbb5cd28f1.pdfIn PDF document text
    • https://site-1177077.mozfiles.com/files/1177077/25858045869.pdfIn PDF document text
    • https://site-1167947.mozfiles.com/files/1167947/oye_chico_huevos_cubanos.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/fasanag/58626164964.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/video_editor_apk_pro_premium.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/kowogebekukixa.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_off0000f250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF250 5060 bytes
SHA-256: 00e054f18772ead6bc3c574db82399e1ee2b53bf2cb801fb0a12d64b8fd817e5
font_01_sfnt_off000103ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AE 11464 bytes
SHA-256: 5ee94e4f9da4ceaf5de89e4f2b6887c0bebd1f039896c90b11389be15aff46b9

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