Malicious PDF — malware analysis report

Static analysis result for SHA-256 9344c38c66ccbfef…

MALICIOUS

PDF

75.1 KB Created: 2021-04-03 00:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 40447b764c83781f3123956ffe016fc1 SHA-1: 9a600f9a89bfa93ba61861d7e9a63d3c4e53bbe3 SHA-256: 9344c38c66ccbfef5833e37d6f9b2f9d318b483db5c3e46c0b8688e34c419de2
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one prominent URL pointing to 'resalured.ru', suggesting a redirection to a malicious site. The document body, though heavily obfuscated, contains text related to connecting an Xbox controller, which is likely a lure to disguise the malicious intent.

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
  • 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://resalured.ru/strik?utm_term=how+to+connect+xbox+one+s+controller+to+bluetooth+headphones PDF link annotation
    • http://lnstagramcopyrightmanagement.com/38895323110f1j15.pdfIn PDF document text
    • http://weinmvc.net/slime_hd_wallpapertb0w9.pdfIn PDF document text
    • http://dominis.xyz/how_much_did_dash_dolls_make5qrr5.pdfIn PDF document text
    • http://copyright-supporthelp.com/68259941180dm0ld.pdfIn PDF document text
    • http://digitalliteracyinstitute.com/basketball_trick_shots_at_hometdpvy.pdfIn PDF document text
    • http://axecheat9.xyz/mifogamix7z04o.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/443a72a2-2445-4864-90b9-2d9deff0f148/44940318043.pdfIn PDF document text
    • http://wujawejibizub.epizy.com/bozaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b279ad7e-34da-45bd-b401-4a3133d065e5/what_are_some_of_the_sins_in_the_bible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b1aa800-8e10-4829-a15b-28c3c72b82d3/58515576335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02ab1299-f7c7-47cc-84cf-bd21b94e3d20/new_testament_vs_old_testament_god.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5764fc6e-d6b2-42ea-b6ed-08067a00cbcb/9754317315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/322ca1c2-735c-4d27-ac57-c068b4b4bc1a/52521691897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/227b11c5-aad8-4f60-9739-35c22b30a52f/is_there_an_it_chapter_2_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5601165-573b-4f57-9ac9-44ba5e2a3c26/98256283042.pdfIn PDF document text
    • http://kijekamazeju.epizy.com/zusetemubefolikususutapez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a697081d-c223-498a-b557-c6fe227c759d/sports_facility_business_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd621dce-9e1b-4be7-9dc1-1613533e2d7e/sewaxekurawimusuzibimosu.pdfIn PDF document text
    • http://fakodesugi.epizy.com/91822238467.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_off0000e8aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AA 5420 bytes
SHA-256: f23853a13ee3690da2eedffc1f6090be44dcd66028eb2623115afddcf107909e
font_01_sfnt_off0000fb1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1E 10408 bytes
SHA-256: 5c13db5ff2246c85a73cd2dce4ed520900c8ab1c34d68ecc2d585f0e7821987b

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