Malicious PDF — malware analysis report

Static analysis result for SHA-256 146964c43e7cdf67…

MALICIOUS

PDF

81.0 KB Created: 2021-06-08 11:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: a204a1d60471bec4244ca408836885ce SHA-1: 0fd0580a5c3d719d1824ff2d2b3fcf63e29ccf84 SHA-256: 146964c43e7cdf67cee0d8afe32be78057eb57a7ab1f6275427deebf775b3c87
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, embedding numerous external URLs, with a primary URL pointing to a suspicious domain. The presence of a large number of external links, many of which are on disposable hosting, suggests an attempt to direct users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/123?utm_term=balboa+park+san+diego+map+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477139/normal_6013ee0be7e27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502464/normal_604688231a296.pdfIn PDF document text
    • https://bebejumupetokox.weebly.com/uploads/1/3/4/5/134513190/4533909.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390051/normal_602e4fac139a4.pdfIn PDF document text
    • https://bativizamazon.weebly.com/uploads/1/3/4/7/134770744/dedorame.pdfIn PDF document text
    • https://sidugavumudoriz.weebly.com/uploads/1/3/4/9/134902227/tirapibazevupifomow.pdfIn PDF document text
    • https://pizizidoto.weebly.com/uploads/1/3/0/8/130873839/rojof.pdfIn PDF document text
    • https://xogepojofaridel.weebly.com/uploads/1/3/2/7/132741214/76d1bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490752/normal_5fd65b05c8a11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403818/normal_60170b26567c4.pdfIn PDF document text
    • https://kosazuritejozu.weebly.com/uploads/1/3/0/8/130874521/7596445.pdfIn PDF document text
    • https://niduzipotobumam.weebly.com/uploads/1/3/6/0/136054567/fa3c0c2d02.pdfIn PDF document text
    • https://jakemujilofadam.weebly.com/uploads/1/3/1/3/131380171/mokilobita.pdfIn PDF document text
    • https://nevidabaxava.weebly.com/uploads/1/3/0/7/130775666/konaxofaguta.pdfIn PDF document text
    • https://bevikafu.weebly.com/uploads/1/3/4/7/134710030/nesutaguradik_jufixa_turesibikenokar_pafuvajo.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/a1030f88-26bb-4c76-bed8-4e262786a40d/jam_speaker_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/592e7a82-8388-404a-ae8a-54004ed61ff7/46840810234.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04e08ca7-25e4-4e1f-9919-f5c077be7875/zilaxejopuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc9d321f-5083-4be0-bddd-279d7adceec3/what_is_the_philosophy_of_nonviolence.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_off0000fb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7C 5612 bytes
SHA-256: f6306b2dfcf24773aa6b86c8f0fee545c461f1d3e9f72d304cdc6265ddba5c05
font_01_sfnt_off00010e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7C 11816 bytes
SHA-256: d721c25e9c1c314cb1d6bc97f925dac18ebcdec46cd5e038733119ce4c30cb38

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