Malicious PDF — malware analysis report

Static analysis result for SHA-256 97934b16a895917f…

MALICIOUS

PDF

87.0 KB Created: 2021-03-08 14:48:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 26b65cd6421968f6d234db3fc71df6ae SHA-1: f6de23b2198ec0ac18665960f512d47e24ffc105 SHA-256: 97934b16a895917f81471c1991d9e167633e83d757248e5ea0c925df21e6c677
186 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with several pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/123?utm_term=scrittura+beneventana+pdf PDF link annotation
    • https://cdn.sqhk.co/rirelolut/jfhgggs/zovogawunubalilopij.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/why_doesnt_she_answer_my_calls.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/AFZgfhl/meteor_shower_may_2020_florida.pdfIn PDF document text
    • http://vawurabel.mygamesonline.org/what_is_benzene_made_out_of.pdfIn PDF document text
    • http://zokoxakabu.medianewsonline.com/543165556.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/97827191494.pdfIn PDF document text
    • https://cdn.sqhk.co/jegisizozul/EYxgiMB/sedirubiful.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/bb0e3f54-4062-40f1-87f7-4e6439062f23/how_much_does_total_gym_cost_in_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/elite_dangerous_horizons_combat_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9c98060-37bb-4eaf-b7f2-71a359ced348/what_is_the_main_idea_of_the_pilgrims_progress.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebae42fc-ddd0-462e-8c18-1d1d8877d9de/mount_and_blade_warband_napoleonic_wars_serial_key_generator.pdfIn PDF document text
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_044014de60314d869d259388f0146e2d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/besafefaf/ashrae_62._2.pdfIn PDF document text
    • https://e3055f73-6236-423b-b810-4bc1a15f300f.filesusr.com/ugd/fa12d1_cc43aea2f0a84dc48ac32ada46c5982d.pdf?index=trueIn PDF document text
    • https://d54d55f4-8004-4613-9f19-7b96cbed0ae7.filesusr.com/ugd/ce4b32_7a1ecf7e48264d32a62c88644d077800.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9a48aaf-c886-47d6-9464-22e838c8564b/what_battery_for_ford_focus_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/442882d0-11d6-4466-81f1-5cc9f55ecd84/wasanuraxoxukasefuzovugon.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/61624039493.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/41326671731.pdfIn PDF document text
    • https://d99d9bf7-a5e0-49f2-90ac-0d1bc881463d.filesusr.com/ugd/0182ef_3f56b4cabf0149908fca256f9884d3e6.pdf?index=trueIn PDF document text
    • http://pisonepegosa.myartsonline.com/nojibubesime.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_off0001007e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007E 5244 bytes
SHA-256: 9b06e93286d22274e84ea8052b160c405a9db187347b796774b3cc8813df0c5c
font_01_sfnt_off0001126a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1126A 12028 bytes
SHA-256: a98e13eca8c50af49991b1e951d2cde98b400b68aea8589b8b7941d13d44ee6e
font_02_sfnt_off00013982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13982 16116 bytes
SHA-256: 6fffb1aeb89666cbcaec4ce24454e19e9ad5757041bd2745d7057949fb60916b

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