Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfee0cb0403c49de…

MALICIOUS

PDF

75.5 KB Created: 2021-05-15 14:42:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c676ccb2c59323e6c871cc7c5a17b81e SHA-1: e4580efa0a7d5bf4c9fc62957c23825bfb1c24a6 SHA-256: cfee0cb0403c49de54cd5425670fca0e6b031baaa049d22bbc37f0153a4a8a35
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, characteristic of a link farm or phishing campaign. The primary URL, 'https://soxebez.ru/strik?utm_term=metallic+bonding+worksheet+with+answers+pdf', suggests a lure related to educational materials to entice users to click. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to a malicious site or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://soxebez.ru/strik?utm_term=metallic+bonding+worksheet+with+answers+pdf PDF link annotation
    • https://cdn.sqhk.co/jalegewiguw/fjjiagh/jaxepuzawof.pdfIn PDF document text
    • https://cdn.sqhk.co/posogamumut/JjbihM9/magic_cleaner_for_whatsapp_apk.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/my_smoke_detector_keeps_beeping_three_times.pdfIn PDF document text
    • http://begetus11ppz.xyz/k9_mail_windows_7_downloadvq9xf.pdfIn PDF document text
    • http://medicinfo.online/nexelinakc8kre.pdfIn PDF document text
    • https://cdn.sqhk.co/nemalerute/ijjcljd/12549615328.pdfIn PDF document text
    • http://soldonlakewood.com/silabiguxihuc.pdfIn PDF document text
    • http://zajiledafalam.getenjoyment.net/attack_on_titan_recap_movie_2020_release_date.pdfIn PDF document text
    • http://dajobod.getenjoyment.net/rakavifutumusamexuzubon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bf68d742-fb98-404a-ab47-1dcf24f7df52.filesusr.com/ugd/83e7fd_09b7f16104064f0f994152f00a61a861.pdf?index=trueIn PDF document text
    • https://95049c82-e412-4913-a0b0-e03e83d5170a.filesusr.com/ugd/127d6e_0466098bd4a249c2b629433e5d729d9b.pdf?index=trueIn PDF document text
    • https://0115c081-d8bc-4983-a705-81db93bf1442.filesusr.com/ugd/990402_6a1b05ec5f194d58aa5a46a10aabeba9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/votawawo/best_free_ballistic_calculator_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/81463066817.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/online_preposition_test_for_class_3.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/13985479382.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/sap_business_one_accounting_manual.pdfIn PDF document text
    • http://bugenerefajujus.atwebpages.com/berenstain_bears_christmas_book_read_aloud.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/sub_zero_550_ice_maker_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/46351132321.pdfIn PDF document text
    • https://ec75ba9f-29a7-4b73-bb51-4c951d20089f.filesusr.com/ugd/17cde0_b8856735a4cb499887f438d442e8a907.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/gufaxoga.pdfIn PDF document text
    • http://jigisasamupor.onlinewebshop.net/bollywood_guitar_chords_book.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_off0000e695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE695 5716 bytes
SHA-256: e3a3f0fd97adb57bf467006fd3ade21e6304745a610d35ca7fc660692a1ee497
font_01_sfnt_off0000fa20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA20 11180 bytes
SHA-256: 23b340e3b37b96be76352fd8ad214be5c96bc86fd893b6f1577a99f458bac702

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