Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad8048ff7ac0470…

MALICIOUS

PDF

86.3 KB Created: 2021-04-05 13:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d50e4c1b3bf471112f4832d300475bb8 SHA-1: b1eccf0bcd4e876094be376cae6ffeb11b285497 SHA-256: 2ad8048ff7ac04704faf1716567d41d0e6548f96c238bf8d361ee32e416e6dd1
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 0.9993

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://druttle.ru/strik?utm_term=are+water+bugs+harmful+to+humans PDF link annotation
    • http://fasad-dom.site/intraday_trading_ki_pehchan_free_downloadu1t9z.pdfIn PDF document text
    • http://bebetadiruj.mywebcommunity.org/xuvugojivigejuwajuf.pdfIn PDF document text
    • http://jabudapitu.scienceontheweb.net/nijewado.pdfIn PDF document text
    • https://xarupasate.weebly.com/uploads/1/3/6/0/136055515/kibazofemeve-sigadima-sivake-valeluleminebis.pdfIn PDF document text
    • https://pitidupokeni.weebly.com/uploads/1/3/4/4/134485339/pilufoni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415740/normal_5fe7e1747272e.pdfIn PDF document text
    • http://intereriia.com/lurajumefivizukea2zd1.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/independent_events_probability_examples.pdfIn PDF document text
    • http://hookup154.fun/bivepteh6t.pdfIn PDF document text
    • http://center-san.ru/8455603866asdsj.pdfIn PDF document text
    • http://reduslimitalia-ufficiale.site/59081921252xnt7b.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/the_devil_s_advocate_book_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459057/normal_5ff5959269a4a.pdfIn PDF document text
    • http://bawimip.sportsontheweb.net/analytic_islamic_philosophy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502436/normal_5fd6a617539fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413226/normal_5ff27cd40112b.pdfIn PDF document text
    • https://panebafizi.weebly.com/uploads/1/3/4/3/134365464/xewakabarebijumi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/xadukukudutokimaga.pdfIn PDF document text
    • https://2cc3dcad-61c1-4442-8662-ca5be7cd8672.filesusr.com/ugd/71b93f_1842e14028294fe5890db2c142213424.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/what_are_job_titles.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/41491982424.pdfIn PDF document text
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_849fb6e72a5e4841b4d34a9286f8e2bb.pdf?index=trueIn PDF document text
    • https://68e1e3d4-268d-49bc-a8aa-b119cb10fea7.filesusr.com/ugd/3ceeb9_7c47fd961ac1460191f16c452255f489.pdf?index=trueIn PDF document text
    • https://23da7c74-6e14-424a-b22a-901aa35eafb1.filesusr.com/ugd/9cc572_ac5ea917295749f982b21e37fd12be47.pdf?index=trueIn PDF document text
    • https://305aa2e3-e1d2-413d-aa2e-f1bb83d03ded.filesusr.com/ugd/92ee2b_60f2b0b91656477691bc49e61bbfd925.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_off000113a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A7 5404 bytes
SHA-256: e46fd922745e660d25c93a96d956f4183c8596182227dc4ff259807b40dc8c2e
font_01_sfnt_off000125f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F3 11408 bytes
SHA-256: 73b038731110982cc21ca65b30da8b74024097f6cb915058f124e085e80bf879

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