Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a71f184d13eb565…

MALICIOUS

PDF

66.3 KB Created: 2020-11-30 15:14:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e7265c938f29be5e7fe59b025a93363d SHA-1: 0896a25c22be04843f4b6e8ba855112dc07561b9 SHA-256: 9a71f184d13eb56599cd70c0f152357c99eb7ac5f829fb876c6bc213280aa267
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffking.ru/123?utm_term=torta+de+banana'. This URL is likely used to redirect the user to a phishing or malware distribution site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL in a PDF document suggests an attempt to trick the user into clicking it, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffking.ru/123?utm_term=torta+de+banana In 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/4bde95c9-ebcc-4d7e-9fc9-e631984f223e/wojeditinomakugopesedegil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b7b21a3-480d-4fc9-83f1-55548ebe0b5b/yankee_doodle_trumpet_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/903417f7-7b26-450c-9629-70a5165f383e/1631574665.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fe29277-4d5e-4495-8d88-5c815943cf40/vararunovoxebunuvokiso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0075e3eb-2f05-4122-86d7-ece175331fae/mesopotamia_political_structures.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc116c5bdb33045eec368a4/t/5fc2643b2dd96f59183c0618/1606575164133/cups_to_pint_to_quart_to_gallon_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/foxit_reader_portable_italiano_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/170f0be8-fb64-457c-aa02-b9e4cfe372e5/75350576260.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68b693d4-a103-461c-aa07-370723893f51/28737409968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db19459b-0730-4bfb-9593-a561260a8e7e/tennis_court_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b8dddeb-0ccb-4d00-8457-e7a8647345a9/60461997132.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_off0000c873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC873 4700 bytes
SHA-256: 7080bc816b732207020705a94850c09cb201d9d17dc6029f21851ca49c3018e5
font_01_sfnt_off0000d873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD873 10768 bytes
SHA-256: 904189445f9f8e2a7e5846005fa115ae67b88c0192f0b7703b32544789ad5dc7

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