Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f784cfa8de2b4c2…

MALICIOUS

PDF

74.6 KB Created: 2021-02-17 06:30:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 33b1204e5513f7e7e3aaace596b8f42d SHA-1: 8f4d840bd7a18b74e969f3b36fc92d6a0d53211c SHA-256: 5f784cfa8de2b4c219f028016c7f2ea2777fba592c55018deaf1b2d34f5abdf1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, including one pointing to 'jatuxijor.epizy.com/xefexazefuvebuwur.pdf', suggesting an attempt to redirect users to potentially harmful content under the guise of providing game cheats. The document body, though heavily obfuscated, contains references to 'crossy road hack no surveys' and authoring application details, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://seumenha.ru/wix?keyword=crossy+road+hack+no+surveys PDF link annotation
    • http://zoosalon.org/pokemon_sun_moon_gba_version_downloag9vh5.pdfIn PDF document text
    • https://gikowotezura.weebly.com/uploads/1/3/4/4/134493608/gofuxijukenosaf_nujijirid_nutitexomupilej.pdfIn PDF document text
    • https://malojedatev.weebly.com/uploads/1/3/0/8/130813840/vemimokapowula_zanozido_somotuzoka_jeriruz.pdfIn PDF document text
    • http://gayerkan.com/writing_exercises_upper_intermediatealg6t.pdfIn PDF document text
    • http://shop-onlain.fun/nabavazukedejanomokvl6f.pdfIn PDF document text
    • https://kusafulidofet.weebly.com/uploads/1/3/4/0/134017607/watataditapex-lemoguderezuv-wuxidamus-najifosokidosi.pdfIn PDF document text
    • http://investmag.org/amoeba_sisters_human_body_systems_answer_keyb35v0.pdfIn PDF document text
    • http://filmera.ru/bhai_bhai_movie_songs_freey56au.pdfIn PDF document text
    • http://kyhni.site/gentoo_gnome_install_guidenzxan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jatuxijor.epizy.com/xefexazefuvebuwur.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/34031254337.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/sozirowovilekaju.pdfIn PDF document text
    • http://kuwopugivowivo.rf.gd/95408351054.pdfIn PDF document text
    • http://bixoravu.epizy.com/jenetovagoke.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/nsw_fair_trading_auditor_s_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/pedamovanenonodulolaxuje.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAE 3468 bytes
SHA-256: 7c2a041a5509658fb712b9406249e32e7772b1fce11da8769d562abf42d43a78
font_01_sfnt_off0000e919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE919 5128 bytes
SHA-256: 85db06b2cd4f989e5d3a0c995affaa3245b01b60aa83042ab7e5e9f68a024267
font_02_sfnt_off0000fa89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA89 10152 bytes
SHA-256: fbbadb4209ade2799d667295bc7ca63654ae482fccae1da6737bd3a7abc28144

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