Malicious PDF — malware analysis report

Static analysis result for SHA-256 96cfe24a1d1a71ad…

MALICIOUS

PDF

82.5 KB Created: 2021-03-27 10:05:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: dfce2109072c2ae731a8066ce6284a53 SHA-1: b247f56a88c0273ef9f02ab543d8b851da4d4423 SHA-256: 96cfe24a1d1a71ad528096739bab04ea086bb8a16e9181853143a063702a094d
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 0.9995

Heuristics 5

  • 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 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://xajibur.ru/award?keyword=thieme+atlas+of+anatomy+head+and+neuroanatomy+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373755/normal_6018781abb3e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452861/normal_600ec2e28b028.pdfIn PDF document text
    • http://lnstagram-office.com/fingerprinting_of_skin_hyponatremia80q0l.pdfIn PDF document text
    • http://b0xberry.online/kojuzenomegatobuvemerifii473f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382414/normal_603530330b9e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481684/normal_603120bb9d41a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495257/normal_5ff005f669a8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448347/normal_603d3e995cb9b.pdfIn PDF document text
    • http://jovaguduretup.22web.org/affidavit_of_support_and_guarantee_form_dubai.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410002/normal_600aad8bb08e0.pdfIn PDF document text
    • http://1xbet-regi.site/990095232770altf.pdfIn PDF document text
    • https://cdn.sqhk.co/nobukomorur/geiighu/likes_and_dislikes_exercises_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/nepusoliweda/bhgddhe/nogijot.pdfIn PDF document text
    • http://prequester.online/what_do_i_need_to_renew_my_non_drivers_idv5ajk.pdfIn PDF document text
    • http://socialwave.me/195014681265dcot.pdfIn PDF document text
    • https://cdn.sqhk.co/rovukupovumo/bjhlm82/hamster_small_house_diy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485704/normal_5fe6774a3076e.pdfIn PDF document text
    • http://216tilford.com/historia_de_la_geometria9c3mq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420025/normal_601b4914c8b9c.pdfIn PDF document text
    • http://bestpriceforukraine.xyz/26611116686qszvd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://regipikiwubadov.epizy.com/cathode_ray_tube_diagram.pdfIn PDF document text
    • http://wegijadisi.rf.gd/nagiximagolizax.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE13 5424 bytes
SHA-256: 39dbd9f0c41f9c1eae0375499946753d8d8f110779a3b40c0e4198c98692b2d1
font_01_sfnt_off00010072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10072 11344 bytes
SHA-256: ad0320445d23462061b1efd0cb06f1423599cbff172b6a8b1500362a28ee30d1
font_02_sfnt_off00012749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12749 16092 bytes
SHA-256: c14de85559d4b33d76026f6d9e3db52c4ed5e8525d58960fe0ba0e0ca9c0a166

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