Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ff126b770768bea…

MALICIOUS

PDF

104.8 KB Created: 2021-03-18 11:43:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 97d2c626fd5b29b69c7e699f505ad603 SHA-1: 97896dd8c1bd6fe0dca975e14567f81283df9a7f SHA-256: 3ff126b770768bea72fad9667caeff70ffb2aad592624186bd7b4116f8a2202b
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://soxebez.ru/wix?keyword=cleric+domains+5e+homebrew PDF link annotation
    • http://kitafoged.medianewsonline.com/what_does_the_lord_say_about_divorce.pdfIn PDF document text
    • http://remastacer.com/pelapnndi0.pdfIn PDF document text
    • http://1xbet-football.fun/8510226807836hzh.pdfIn PDF document text
    • http://dkshlyap.ru/39683190393lo1jr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370309/normal_60115807d8ee6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421939/normal_5fced9372c47a.pdfIn PDF document text
    • http://nawitebexu.medianewsonline.com/a_pocket_style_manual_apa_version_6th_edition.pdfIn PDF document text
    • http://rutopadazemed.22web.org/18989008020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367923/normal_6046077a8f6a8.pdfIn PDF document text
    • http://nicepics.xyz/cissp_practice_questionse5gjo.pdfIn PDF document text
    • http://zavodtriumf.com/poloful5ru3b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://desovizipelo.onlinewebshop.net/28601229977.pdfIn PDF document text
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_ab80ef7c20ca4720bb4f5ab161cb4d9a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5db405e2-c0c4-4e37-b86e-2f15db86f23b/critical_race_theory_in_education.pdfIn PDF document text
    • http://jalafugidovi.epizy.com/59114383538.pdfIn PDF document text
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_1bdb54dc5baa40e792f6e1ce48bd9e44.pdf?index=trueIn PDF document text
    • https://874c0fd6-92eb-497b-905f-dc7ca4d2e287.filesusr.com/ugd/5ca7d4_e97edadf2b8e49ec881bf68783ad3a65.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/799217b0-40b4-4929-a192-4716e8711ab5/business_analytics_graduate_programs_ranking.pdfIn PDF document text
    • http://wudifubugufejab.rf.gd/crossword_answer_for_food_counter.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_off000149a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149A9 5440 bytes
SHA-256: ed53bc92931c5c0ef1ab003410f281a1d623a07adf66b95308a0a412be240e76
font_01_sfnt_off00015c01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C01 10652 bytes
SHA-256: 92c069a9b704eb8cc2217d13dbd0e7d504811b9990e24ac7c948ebbd171b93e9
font_02_sfnt_off00018096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18096 16112 bytes
SHA-256: 5bfd727b2f7ee29091e3ace5889ca703ec0f2c7bda6870e529c05f5dca190be4

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