Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f6a070fe28aae86…

MALICIOUS

PDF

90.7 KB Created: 2021-03-25 00:54:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13419554cb44b2075ef7cead9df2738b SHA-1: 7bc1dd30ee4d6769800a3be94502f9883f95b339 SHA-256: 1f6a070fe28aae8695de1d287a1c73814abcb3c4e5238e3e26fa4496023d17f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which are SEO-optimized, suggesting a link farm or phishing attempt. The primary URL, 'https://midufefew.ru/wix?keyword=coraline+art+book+pdf', is likely intended to trick users into believing they are accessing legitimate content. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/wix?keyword=coraline+art+book+pdf
    • https://bavopasivivewid.weebly.com/uploads/1/3/0/7/130738836/0199329.pdf
    • https://pelimabogex.weebly.com/uploads/1/3/4/6/134685965/7378526.pdf
    • https://sunudufexune.weebly.com/uploads/1/3/0/8/130874439/mozenojuxuv.pdf
    • https://denuxikunoleluj.weebly.com/uploads/1/3/4/0/134018299/7487525.pdf
    • http://dombitarf.ru/lobulxkpsc.pdf
    • http://opt05.ru/wozariruwu57.pdf
    • http://cartest.pro/signo_de_babinski_positivoh8h6p.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/957f9c34-f8aa-4703-9e7d-8bc1d038f2c3/salesforce_for_beginners.pdf
    • https://uploads.strikinglycdn.com/files/b6fc1433-7693-4d7d-b388-62611c5e0ad2/jimopowiruruxivilo.pdf
    • http://bixoravu.epizy.com/how_to_program_dish_remote_to_wally_receiver.pdf
    • https://uploads.strikinglycdn.com/files/5075058a-ac69-4ac2-9d01-67deedc14e7e/is_there_any_gta_5_money_glitches.pdf
    • http://buvudateba.epizy.com/music_guitar_chords_songs.pdf
    • https://uploads.strikinglycdn.com/files/c467403e-2173-4615-8d20-88cd200794fd/the_process_of_inhaling_and_exhaling_air.pdf
    • https://uploads.strikinglycdn.com/files/73034e34-53e5-49ff-8cab-5eea66e110e7/16327028960.pdf
    • http://tixujuw.rf.gd/7569558003.pdf
    • http://zobotipuzadevi.epizy.com/clasificacion_de_cuentas_colectivas.pdf
    • http://papixunaz.epizy.com/partnership_agreement_sample.pdf
    • https://uploads.strikinglycdn.com/files/3771f377-9171-45e5-8c77-6b9a1c3ae3b0/when_did_the_first_outlander_book_come_out.pdf
    • http://divamepirinati.rf.gd/cervicoaxillary_canal_is_formed_by.pdf
    • https://uploads.strikinglycdn.com/files/8d8e2dce-5a85-49eb-ad22-d334748f8475/gapugamasi.pdf
    • http://kibulirol.rf.gd/bible_old_testament_malayalam.pdf
    • https://uploads.strikinglycdn.com/files/4f511bbb-82ff-41b9-beac-d60b9c91cd7c/jutetufelegekabaw.pdf
    • https://uploads.strikinglycdn.com/files/44c0eebd-fe8b-4d2e-be37-e828062b4b4b/mechanical_engineering_salary_in_india_quora.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117da.bin
7f18f6eb34a4e67f81beecdb5d79457a032199976fc53db52c45561baa80d093		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117DA 4872 bytes
font_01_sfnt_off0001286d.bin
db3fe6e32deb1f68207fe9b6e4303ce47c1fe8a9edc0b46601c6964bf3ddab5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1286D 11416 bytes
font_02_sfnt_off00014f42.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F42 4324 bytes

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