Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b1242eed4833257…

MALICIOUS

PDF

68.3 KB Created: 2021-03-12 08:09:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 43ca6ab7c7f6eaed2ea8b5a20833bcc9 SHA-1: 5d5532601d534d11d1f9924ae956b5b74965456f SHA-256: 4b1242eed48332576e8c1aff3f49c7f5740fd2b621343e89f49027faf9372aef
126 Risk Score

Malware Insights

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

The PDF contains a high number of embedded URLs pointing to various domains, many of which are hosted on disposable or suspicious platforms. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/wix?keyword=la+fitness+stevenson+ranch+instagram PDF link annotation
    • http://wumewil.sportsontheweb.net/james_patterson_alex_cross_latest_book.pdfIn PDF document text
    • https://zibitevurus.weebly.com/uploads/1/3/0/7/130776177/dotup.pdfIn PDF document text
    • https://boduburul.weebly.com/uploads/1/3/4/6/134654649/2952981.pdfIn PDF document text
    • http://pycnidwzxc.info/tawovutisozubmvbx1.pdfIn PDF document text
    • http://gezetola.scienceontheweb.net/vixeju.pdfIn PDF document text
    • http://pek-24.cc/39109729005t5t62.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/2a7f0941c223.pdfIn PDF document text
    • http://lovemecompletely.com/78526765944xhjed.pdfIn PDF document text
    • http://gajonedorebuko.mywebcommunity.org/31489954305.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/what_size_needle_do_i_need_for_my_brother_sewing_machine.pdfIn PDF document text
    • http://tideparipawovu.mygamesonline.org/32305787848.pdfIn PDF document text
    • http://uscarins.info/rikelezabuzabevuwn5hp.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/0c16a5ff-3956-45e0-8bda-469d064a7f88/fivabapasaf.pdfIn PDF document text
    • http://ziriboxemo.epizy.com/address_book_software_for_pc_free.pdfIn PDF document text
    • http://bajupigirosinaf.atwebpages.com/7610251698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6a9540a-3a54-45ba-ae31-fa4f6a5b840f/27819254172.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1b18270-f770-43b0-b0b8-020aa57be919/how_to_connect_a_furby_to_the_app.pdfIn PDF document text
    • http://dorizoki.rf.gd/kakoto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c100ed8-5512-4c73-9d0e-db6dfda60e22/yardman_riding_mower_for_sale.pdfIn PDF document text
    • http://wufizomofoduzin.rf.gd/gloomy_sunday_andras_spielt_piano_sheet.pdfIn PDF document text
    • http://wewapozolebupo.epizy.com/mosijodipemeloxiriwed.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_off0000ceaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEAF 5264 bytes
SHA-256: 0516cd9712d78df360226a52da404b9bbe851f85f007b8468ea402fecaf28a9e
font_01_sfnt_off0000e083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE083 10240 bytes
SHA-256: 1672ab401484b3b3f3c8e12309575ef63bc790c957318981cec6d7a58450e471

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