Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebad24133fae1d7a…

MALICIOUS

PDF

71.0 KB Created: 2021-03-16 06:49:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f1c0e0e17dbffe765693e740696dede6 SHA-1: 24f8908714fff7d2fd2a44836629cb38230137df SHA-256: ebad24133fae1d7a57fc2a49078464de5b1afd86a90209923530893322be2f3f
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classifier flagging further supports a malicious intent. While no scripts were directly extracted, the structure suggests it's designed to lure users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/wix?keyword=gangsta+bean+3 PDF link annotation
    • https://tutamakut.weebly.com/uploads/1/3/0/7/130776204/zofapuxe.pdfIn PDF document text
    • http://onlinesos.tech/892455690483y0u2.pdfIn PDF document text
    • http://erogan-columbia.site/federal_resume_template_microsoft_word3138j.pdfIn PDF document text
    • https://zowatiloni.weebly.com/uploads/1/3/0/7/130739934/tafekewodavizolemag.pdfIn PDF document text
    • https://rabebazenapaju.weebly.com/uploads/1/3/4/7/134771608/judunuzefefuvim_demizolusakojew_zurimepiwunaso.pdfIn PDF document text
    • http://vutisonoj.sportsontheweb.net/the_lord_of_the_rings_book_series_in_order.pdfIn PDF document text
    • https://nulabelavomeviz.weebly.com/uploads/1/3/1/4/131413951/furotajo.pdfIn PDF document text
    • http://nopipawipafa.22web.org/dituvubiliwasefeseti.pdfIn PDF document text
    • http://dkblogin-de.best/ralekavupuxoxeravalizazek0j8nq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kofabube/wulimawex.pdfIn PDF document text
    • https://db244590-af71-4c33-bd6e-2f8f55f31281.filesusr.com/ugd/fdab61_b815b63dd7fb4aa8a3fe9e3f5348e107.pdf?index=trueIn PDF document text
    • http://natexekazedap.epizy.com/art_and_craft_ideas_for_teachers.pdfIn PDF document text
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_e25830fe81c34e5fa3c49877cbae81a8.pdf?index=trueIn PDF document text
    • http://geforagegi.atwebpages.com/lajoru.pdfIn PDF document text
    • https://b913155d-2712-4fd4-bcc6-651970a8c456.filesusr.com/ugd/e39924_8c36371fdbde4840af5918eb6430d793.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/43740851644.pdfIn PDF document text
    • http://joriboka.epizy.com/75258557815.pdfIn PDF document text
    • http://junenizexi.epizy.com/malinupirifade.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_off0000d8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EB 5060 bytes
SHA-256: db0cf33d0043bc769f5d8308aa1b110d2bdf142775d2c53737dd78741fb2e479
font_01_sfnt_off0000ea41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA41 10864 bytes
SHA-256: f4684b0a50a1339b3e6fc6f0b5de2a77ac9f7b9ded97d45a90483fec684c9238

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