Malicious PDF — malware analysis report

Static analysis result for SHA-256 a98addbe18808061…

MALICIOUS

PDF

79.9 KB Created: 2020-12-27 05:17:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 165554e4aae55b4e4a9eee8029755500 SHA-1: 9b166f2987190b1b6d9ebb5289b72b564a98fa70 SHA-256: a98addbe188080613ece3394054ac5c58137c082c746993dcd44a601129ad4cb
194 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a malicious redirector, specifically designed to lure users with a fake download of 'Atomic Habits'. The primary IOC is the redirector URL, which is known to lead to malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and malicious redirector link strongly suggest an intent to deliver a malicious payload or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/aws?utm_term=atomic+habits+pdf+romana In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f8b04c9df41e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387939/normal_5f9c02d371bf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479688/normal_5fa8db631f204.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454807/normal_5fe23639221d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413696/normal_5fa9118c3902a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459621/normal_5fa830274e5a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405899/normal_5f926309bc1ec.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/cf7369b9-af12-4d52-8ea8-d37f5c2047b6/36003696167.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/466b3d5b-76b5-4a13-8206-abd5d5b1cc72/91601049536.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/58396770165.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56d4166c-ea2f-444e-8507-4f9e4d11f134/gizevamunawofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e2bc2d3-7d2d-431f-8702-5ccb1325fac7/sibuzuvinurinixonagifug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0de50f71-68f2-42ec-870a-0bbb2eb7799a/kiwurobatiri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44ee0df0-2025-4e21-a74c-2cf20cc358fd/6238303069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03ae31ac-2429-4985-9b04-1ceeac8c11a3/gekuganowesipezomuk.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/shapes_and_colors_worksheet_for_kindergarten.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_off0000e65e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65E 5492 bytes
SHA-256: 89d45683f82b52678d40c17f84a6773caae1842190f6e0dd38fccf673209fedc
font_01_sfnt_off0000f8df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DF 10512 bytes
SHA-256: 6a09937ee0b444d98ca7e5bb6a345d3e3667ac839725358d12a783120a78c3b1
font_02_sfnt_off00011c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C80 16376 bytes
SHA-256: 684a3c196e802b4dc45ee85e0d12f41c83d6b6c6a55a83cec5fb8e332ee9aa36