Malicious PDF — malware analysis report

Static analysis result for SHA-256 becd2c12b4bfed08…

MALICIOUS

PDF

84.9 KB Created: 2021-03-31 16:16:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 312bd3445e845a948c116710efc45d36 SHA-1: 0f13270f39c8b6ebafcc9a5c8c07d45d08f19cf6 SHA-256: becd2c12b4bfed08d9ab44b3a82b1a68ae4d4f39302abcd334cb74fc994fcd4d
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 0.9997

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://xezojetit.ru/123?utm_term=mechanical+engineering+projects+list+pdf PDF link annotation
    • http://jazeforip.22web.org/letter_writing_format_for_school_admission_request.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480756/normal_60264fb007c87.pdfIn PDF document text
    • https://lugexobamav.weebly.com/uploads/1/3/5/9/135965248/jubuxojovitojobuzafi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472216/normal_6059485fc31ed.pdfIn PDF document text
    • https://povobaza.weebly.com/uploads/1/3/4/3/134383372/noruzikezidifenunevu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484097/normal_5ff755c5deff0.pdfIn PDF document text
    • https://nipizizit.weebly.com/uploads/1/3/0/9/130969905/8362026.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482189/normal_602609f895e35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374986/normal_5fd739139d908.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/xufoxorog/vonojika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bb2291b-e40a-4366-bbbf-8d38c2404c25/what_to_believe_bayesian_methods_for_data_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/jevax.pdfIn PDF document text
    • https://84d655c4-d84a-4a0c-9c32-0387925bd622.filesusr.com/ugd/6233da_a36a650864f145de9c8374915ad159e7.pdf?index=trueIn PDF document text
    • https://a54de82d-0003-4787-801b-d7ee719c780a.filesusr.com/ugd/8d57bd_9ce6713484c347ca815577e51cc190d4.pdf?index=trueIn PDF document text
    • http://fugiwebagatikog.rf.gd/adjectif_qualificatif_pithte.pdfIn PDF document text
    • http://najixol.epizy.com/ramisedep.pdfIn PDF document text
    • http://retesatitogeli.epizy.com/53739488179.pdfIn PDF document text
    • https://65fca3b3-7ce8-4d56-9bc8-ebe46cc5223b.filesusr.com/ugd/f6ed72_0b49ae96d5cd4510b793622c3e00c4ca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/hp_officejet_pro_8600_plus_driver_download_windows_xp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d7604cf-5ecc-4be0-8b56-b3762137ea35/ivan_ilyich_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/297e59a2-8615-4847-a674-875dc4395565/best_colleges_for_ms_in_management_information_systems.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/games_for_pc_offline.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E03 5496 bytes
SHA-256: d0e82f18780d63e858603cec92352588476ddfc3d0c67ce8f723fc98015c7fbf
font_01_sfnt_off000120c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C2 11280 bytes
SHA-256: 5f21d6ea3008ef6c106771149dcf1291ee83b3d1f86e7ecc1cc46cdb237e023f

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