Malicious PDF — malware analysis report

Static analysis result for SHA-256 2568d8411392c913…

MALICIOUS

PDF

77.0 KB Created: 2021-03-18 03:59:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dc23796c8a6485f953dfeaa96a1bc24f SHA-1: b341042be06f161953a4850a18c4d334fb3a8af7 SHA-256: 2568d8411392c9134e148ca989b4e030e4f477f58d4e5158948b9e46383e63ca
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 0.9996

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://pelibifir.ru/strik?utm_term=oracle+database+12c+pl%252Fsql+programming+mclaughlin+pdf PDF link annotation
    • http://lunesygets.xyz/which_i7_laptop_is_bestu33kt.pdfIn PDF document text
    • https://cdn.sqhk.co/pozigafo/gvfgehd/68792604280.pdfIn PDF document text
    • http://gabixumupa.22web.org/is_the_boy_who_harnessed_the_wind_nonfiction.pdfIn PDF document text
    • http://ruvenebigolusep.mywebcommunity.org/arm_workout_chart.pdfIn PDF document text
    • https://cdn.sqhk.co/zagawodijimo/fB9rhdD/edital_prf_2013.pdfIn PDF document text
    • https://cdn.sqhk.co/widagawinud/hbjiHg8/find_duplicates_in_excel_between_sheets.pdfIn PDF document text
    • http://rostov-mobile-doctor.ru/wozurunobscadr.pdfIn PDF document text
    • http://strahauto.website/wexedomitizurobo3yjmo.pdfIn PDF document text
    • https://cdn.sqhk.co/minederepa/hgjjic3/tafuzofita.pdfIn PDF document text
    • https://cdn.sqhk.co/jutigurotow/aijiahg/exponential_graphs_gcse_questions_and_answers.pdfIn PDF document text
    • http://solent.bar/85778038602ozdre.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/namajopisududo.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/f30211e5-16ad-40dd-baa2-91f3011849bd/what_to_do_when_thermostat_is_not_working.pdfIn PDF document text
    • http://logerabul.rf.gd/nintendo_error_code_2813.pdfIn PDF document text
    • https://6648aa49-deb3-4d6f-81a8-a63cc7a297fb.filesusr.com/ugd/38eac1_e24a100338a448f7b45c0963de7f3170.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0549a32b-5e7e-4127-b480-f61b4ca56681/siwofekuvogikudifudovalal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eed3a78a-dfdb-4d84-bcbd-86f10b22b136/ccna_routing_and_switching_portable_command_guide_3rd_edition.pdfIn PDF document text
    • http://jadurik.rf.gd/calvinism_vs_lutheranism.pdfIn PDF document text
    • http://mixonanax.epizy.com/guide_book_of_class_9_science.pdfIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_b57d2dc02a1147ceb8fe1cf70eabab5e.pdf?index=trueIn PDF document text
    • https://de2ee6d5-caaa-4265-b15c-40100ab77d99.filesusr.com/ugd/d43733_114ae2f45a7a4deab5d887cd47c61c2b.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8D 6084 bytes
SHA-256: 23298aeb4fd207c94ef088923682f1b97bc21bf9a2e90cc81fdeda049392e572
font_01_sfnt_off0001000d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000D 11256 bytes
SHA-256: 4a628873e6f3be58054d594aa1440b7656f3e934810d5d34afd8efe5e7881a2b

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