Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce0f4a6bfdf3b054…

MALICIOUS

PDF

78.7 KB Created: 2021-03-24 03:46:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e03c33087ef1d8f08b52d47b894b5dc0 SHA-1: 1b35487aaf7ab01a86a562ef9cecc296d3859b6d SHA-256: ce0f4a6bfdf3b054580bce61446e957369149197863e668465dda0400d297d14
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://jottigo.ru/strik?utm_term=use+your+mobile+as+a+remote+control PDF link annotation
    • https://cdn.sqhk.co/letareximo/ihifhfd/nasal_congestion_symptoms_of_coronavirus.pdfIn PDF document text
    • http://monubagujizud.mywebcommunity.org/4637814455.pdfIn PDF document text
    • http://sajiwurejedetu.sportsontheweb.net/vuzikedaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389820/normal_60267bbf65a0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368768/normal_5fe51356caa80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484359/normal_5fc5ce37e9265.pdfIn PDF document text
    • https://cdn.sqhk.co/tefaxobaf/jiawzia/marshmello_dj_wallpaper_hd_iphone.pdfIn PDF document text
    • http://warupipujamoru.sportsontheweb.net/what_makes_a_literary_text.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/0032be73-93af-4dd3-a432-929f920a3974/texegufux.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/10010685434.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6410f2a9-bebd-4837-8a06-6947695fb9f6/ledejajeka.pdfIn PDF document text
    • http://zakefuki.myartsonline.com/jofev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c83c9614-a08c-48de-9245-407df975e13c/the_book_of_jasher.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/que_significa_soar_caminando_sobre_agua_limpia.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/aluminium_checker_plate_sheet_melbourne.pdfIn PDF document text
    • http://kakasis.onlinewebshop.net/doterasitegorupul.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_off0000f38b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38B 5180 bytes
SHA-256: dce6487eda77bcc773fbe454a6513d76097c676ba49965a7ebc96b092a0422d1
font_01_sfnt_off00010516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10516 11484 bytes
SHA-256: c781b7420263a54bcd2fce7ff1a4de73c23f122730ee2508d78cbcb7bc6dd595

Open this report in the interactive analyzer, or submit your own file for analysis.