Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ceb5779435348f…

MALICIOUS

PDF

78.2 KB Created: 2021-03-17 04:52:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c4c13e344f2897e5a0821338a5eec07d SHA-1: 9ef1d20e2756233a5cea19d644cdef71dd06757f SHA-256: e6ceb5779435348f0299a3cd52eace8fb8f786d3c722ab916cb9362e25285cb5
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-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://fokemale.ru/strik?utm_term=can+you+get+a+ga+drivers+license+online PDF link annotation
    • http://bejisosubonito.sportsontheweb.net/16096168333.pdfIn PDF document text
    • http://fitademaluj.iblogger.org/bakepozejoratumujopesopap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407729/normal_60437f898a0b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388037/normal_600b16f9041dc.pdfIn PDF document text
    • http://xepewifub.mygamesonline.org/fupixulobuli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495694/normal_601d7a2762f00.pdfIn PDF document text
    • http://lilubaxubaxulu.sportsontheweb.net/37081214602.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tupusivamiguta.rf.gd/cartina_amburgo.pdfIn PDF document text
    • https://acaa17bf-cf2e-4132-a9e9-810271eb8bc4.filesusr.com/ugd/ab5b4c_afb63278f54b4906a525af641186a6a6.pdf?index=trueIn PDF document text
    • https://711920be-b761-4f0e-a604-762b26663b16.filesusr.com/ugd/ffcbea_839a138e026b43ae97c3bd30c233c9c8.pdf?index=trueIn PDF document text
    • http://mimelaketikapex.rf.gd/pevizafugivezinakepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e2b5fd3-f204-40ed-a0d8-802c2ec11581/how_to_set_the_time_on_an_armitron_chrono_watch.pdfIn PDF document text
    • http://bofurirekotiru.epizy.com/lixuvurivuza.pdfIn PDF document text
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_1201a51d7dfe46739c51f5cfb05e539b.pdf?index=trueIn PDF document text
    • http://ximitexus.epizy.com/dobadomimijekep.pdfIn PDF document text
    • https://db532842-334f-4efb-8993-e67ec8f20ff5.filesusr.com/ugd/bc5be3_4d27fc96a26146c5bf947e13cdac388c.pdf?index=trueIn PDF document text
    • http://dosunadis.epizy.com/sifizuzosezulazeboja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6cece42-735f-4a54-aa9d-8aa330967490/bilifisalosituwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dbabfa8-60bb-468c-ad04-46ff9ca07c0f/less_than_zero_book_review_ny_times.pdfIn PDF document text
    • https://7893bdd6-41e4-48f6-9953-3a636dfb5d61.filesusr.com/ugd/c5c63b_db93c4d9ce84465cb77641d1fc5af44e.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_off0000f256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF256 5176 bytes
SHA-256: 5a6e0fd217e0a369d84ccfe5bdd106ec269fa35071775118b383eb6c515ecb4c
font_01_sfnt_off00010408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10408 11684 bytes
SHA-256: e85c60a9fe035929521a5e03d45072c73d42b9c72193322205ed2fdfdd256c57

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