Malicious PDF — malware analysis report

Static analysis result for SHA-256 64524518bb9c8879…

MALICIOUS

PDF

75.9 KB Created: 2021-03-11 11:40:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b0c4eada1866a60b268236c88931e9a5 SHA-1: 22c4355ad4747e8efef46131bcdf3882991d0510 SHA-256: 64524518bb9c887932102788582c822e91c774ab4d8ef43ff719675fe1e11a2d
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-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://botokaw.ru/strik?utm_term=polar+graph+paper+printable+pdf PDF link annotation
    • http://barajofa.mywebcommunity.org/everything_is_illuminated_free_download.pdfIn PDF document text
    • http://nitanupemil.mygamesonline.org/delegation_process.pdfIn PDF document text
    • http://center-about.com/how_to_turn_on_wii_u_controlleryagai.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403960/normal_604159e75ad8d.pdfIn PDF document text
    • http://umkatrade.ru/ruborolekaguoy25j.pdfIn PDF document text
    • http://nicepics.xyz/como_passar_um_arquivo_para2vkz9.pdfIn PDF document text
    • http://idealica-italiaufficiale.site/56155288291ix6ia.pdfIn PDF document text
    • http://tehnotop.space/caillou_theme_song_trap_remixsw7ss.pdfIn PDF document text
    • http://retamos.mygamesonline.org/access_control_list_configuration.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488335/normal_604199ea61684.pdfIn PDF document text
    • http://arbitestpark.xyz/ginozijenevoradesikoi2d97.pdfIn PDF document text
    • http://samyog.ru/27029564637tfyk0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470698/normal_6020a508c45c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408475/normal_601476df85f54.pdfIn PDF document text
    • http://tradebot.space/jane_austen_movies_streamingvo5ch.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_7243b882acd94ece8f60c64710199455.pdf?index=trueIn PDF document text
    • http://wiwosotu.myartsonline.com/virubebedotokuwojilu.pdfIn PDF document text
    • https://71a0d42b-91d5-4e94-9338-ff69ca8a624b.filesusr.com/ugd/e5d5e5_7140baf5c32a4386b4f118893bb4daa7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf090093-e47d-452d-9b8d-63a3cf23b33d/book_thief_summary_part_9.pdfIn PDF document text
    • https://97783159-ced7-426e-9fbd-60d2bb3342fb.filesusr.com/ugd/00058f_e69491378c9b4d70b69febdc5f1912ac.pdf?index=trueIn PDF document text
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_9f54f113233041a3b27eabbb6ca81c05.pdf?index=trueIn PDF document text
    • http://gixopiv.onlinewebshop.net/20821514704.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a31507e-851a-4259-ac11-5c5af4bea514/how_to_pair_a_logitech_mouse_with_new_receiver.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_off0000ec3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3E 5264 bytes
SHA-256: 56ecd8bfdce68018992267191d703ace611376f5ccbcac5b17159e22253277ca
font_01_sfnt_off0000fe1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1C 10572 bytes
SHA-256: 971021b01076d8fb208d2bed1701695549b61482f0f1c9c1cb996a8fa262147b

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