Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b9ad43b56109b53…

MALICIOUS

PDF

77.6 KB Created: 2021-04-02 00:07:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d0159fed6634a6ff6e322ca14dac0256 SHA-1: 09462ad28d0b9ddba33fa77d7d9a9f21d894a93a SHA-256: 6b9ad43b56109b53c0a9e8508e1ba7e5125c65a56ebe24e7d41375781471ff07
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://pelibifir.ru/award?keyword=alcanos+ramificados+ejercicios+resueltos+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367640/normal_5ff5c1593180a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451021/normal_5fe91042e9f16.pdfIn PDF document text
    • http://kleomaften.online/xeputafesaxitexokosaf6mc9.pdfIn PDF document text
    • http://blablablacar.online/supixaxuvutijibipi2s3kw.pdfIn PDF document text
    • http://bufaturofonoko.22web.org/cybrary_course_er.pdfIn PDF document text
    • http://the-english-temple.com/prince_edward_island_mapchh3r.pdfIn PDF document text
    • http://fullpisetc.ru/where_is_the_city_of_babylon_todaywa794.pdfIn PDF document text
    • http://securespot.ru/rimor408cz.pdfIn PDF document text
    • http://goloturasituj.66ghz.com/24389639498.pdfIn PDF document text
    • http://hydrofthol.space/27378571153575ug.pdfIn PDF document text
    • http://limecash.xyz/68902387894jw4ru.pdfIn PDF document text
    • http://wigojomet.22web.org/77702282402.pdfIn PDF document text
    • http://kixamugefuwa.22web.org/wepezidusadapezelobaxevo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://41d9b059-0b17-466b-96e6-f31a3f3e9b19.filesusr.com/ugd/f1ead9_7333090506d64a37bc6801b3dab8bce6.pdf?index=trueIn PDF document text
    • http://jekidosokun.epizy.com/bixolon_net_configuration_tool.pdfIn PDF document text
    • http://fakefidefunes.rf.gd/78271338197.pdfIn PDF document text
    • https://d7e981a8-8c4a-445e-aef0-60d3d4911bd2.filesusr.com/ugd/65d69c_22638681a4714fb587dea9ca19e5c538.pdf?index=trueIn PDF document text
    • http://votofeki.epizy.com/18236085563.pdfIn PDF document text
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_3723b3f96d2e42a38e2ed5e756225bbc.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EE 5248 bytes
SHA-256: d905fb0db1800ad39665b1a5a1f5c8a232156c5dd854360cdbb0c8f089bbbc7f
font_01_sfnt_off0000f2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A2 11668 bytes
SHA-256: 925ef45204c6b6ea5edafb9a8682923eb9436399d854ce623e53cd26b89725a5
font_02_sfnt_off000118ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118AD 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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