Malicious PDF — malware analysis report

Static analysis result for SHA-256 305314224bf97b19…

MALICIOUS

PDF

72.5 KB Created: 2020-12-31 17:41:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8455296bae25911039d6b9d3835cd7c2 SHA-1: 9f44262708f745770fd5ea80d4c38f3731a955c2 SHA-256: 305314224bf97b1908155f75661c1eca39460b06a4f971d7fb5631cda965b93c
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/strik?utm_term=alone+marshmello+lyrics+10+hours'. This URL is associated with an advance-fee scam lure, as indicated by the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector and the scam lure strongly suggest a phishing attempt.

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
  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://cctraff.ru/strik?utm_term=alone+marshmello+lyrics+10+hours In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390659/normal_5fbc7445054b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444852/normal_5fddbecc51325.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527357/normal_5fbea33d024f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373769/normal_5f88d665c8879.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392857/normal_5fd7c14ddc7a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5fbd253c68d00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427529/normal_5fa5b399a6b96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368772/normal_5f8c563a20618.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/3ec50a85-eeea-4570-aee6-ec85b1bbc4c5/uefa_champions_league_results_18_september_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/non_probability_sampling_method.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dd1f473-42fa-447c-bbe9-e7d4322ee148/2765654809.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/082bfb7a-d3a6-46d3-94e7-f8e506b6d799/dragons_titan_uprising_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/n._c._c_song_audio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34fbd698-708d-4ebd-a9f5-3e1e239d8913/exotic_ship_locations_nms.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D6 5324 bytes
SHA-256: 9a9eaf08dbc7ebb730e1b6aa49ff9e6bd102bc822e49ff1989735dc6fe3c451d
font_01_sfnt_off0000dbc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC9 10140 bytes
SHA-256: 4ba0e96fa2d282a67a0fe35e65e4932e475aed43d85e0a05008f054999aee4e8
font_02_sfnt_off0000fec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC5 16060 bytes
SHA-256: 8f676b3be356e2086f34f7c81dd3575184be90372cbe0b4aaba7ba30be3377d2

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