Malicious PDF — malware analysis report

Static analysis result for SHA-256 aefc97eccf87e115…

MALICIOUS

PDF

76.9 KB Created: 2021-03-29 23:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 801ded3ca2aaa68c0b8ce6bb68348995 SHA-1: dcbc50d2862f30bc330105b89061c199d4bb2295 SHA-256: aefc97eccf87e1153f3d6d94cf3854db46402ecbf2dfc6b1365b80f21ba60e33
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://jumiwimov.ru/strik?utm_term=inteligencia+emocional+segun+varios+autores PDF link annotation
    • http://igcopyrightverify.com/email_signature_photoshop_template9p5y6.pdfIn PDF document text
    • http://creditpm.com/3036206826794w9.pdfIn PDF document text
    • http://jezituwevusefaf.iblogger.org/14168368130.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zamoguwudegovo.rf.gd/possessivpronomen_italienisch_bungen.pdfIn PDF document text
    • http://tiguvazigavis.epizy.com/b._form_course_details_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/176b1a06-f44e-4f1e-a3ed-026160b8b339/20742270377.pdfIn PDF document text
    • https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_8e2f6b0c31b047db96c017d9dcbaf63b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c7b926d-4415-46b0-89dd-c28cbf1d0c0a/naval_letter_format_template_.doc.pdfIn PDF document text
    • https://5984e891-aecd-43e6-866f-efdb297c9c35.filesusr.com/ugd/403565_3588ab21b8af4a39b47d72eb659cab66.pdf?index=trueIn PDF document text
    • http://fevovamebabeji.rf.gd/80728727772.pdfIn PDF document text
    • http://kojaburu.epizy.com/corpus_weather_report.pdfIn PDF document text
    • https://cc6d8859-fc08-4100-a073-55b48c5addfc.filesusr.com/ugd/238140_b1590efbcd254a8ab8516eb5246754c8.pdf?index=trueIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_4c612606dd5c4a36bc46d7a505f69d92.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff8f302a-ea11-439b-b72d-df49e7d340ac/32039062630.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efe6bdc5-853c-4a0a-9c95-2b89ce6a7344/metal_gear_solid_4_big_boss_voice_actor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3605c547-4175-4312-9371-cb574376f857/43640399175.pdfIn PDF document text
    • http://liwaferizezu.epizy.com/active_and_passive_voice_rules_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5362d4ff-976a-4bcd-9390-5eea558e1ce9/how_to_play_blues_scale_on_bass_guitar.pdfIn PDF document text
    • http://judixipe.epizy.com/87924888852.pdfIn PDF document text
    • http://lejafekisu.epizy.com/c_est_ou_il_est.pdfIn PDF document text
    • http://wivukirotodit.epizy.com/can_ufc_4_be_played_on_ps5.pdfIn PDF document text
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_6387c6f1f1eb4d28a2ed668fbca19457.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_off0000ec22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC22 5116 bytes
SHA-256: 47cad4cff6974e8c1f9b7b4bf601474c7ee5dd45cf5bff8ea5acd9fc4b1ba3f8
font_01_sfnt_off0000fd7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7F 12152 bytes
SHA-256: a5c2f896b611056b46e6bc28be53ed27310f4186880d02f9d162dc7183c33eb2

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