Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec67c48a415e25b…

MALICIOUS

PDF

80.7 KB Created: 2021-03-28 13:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 09ec709f41405a5e0b65130538ff9797 SHA-1: 6106e8c76a8a50f4a6ee794dfa288e93e7047dfe SHA-256: cec67c48a415e25b9bb02707f1d0c97098fc22c0700f900e99be3bec5456e332
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://crophysi.ru/award?keyword=inter+ethnic+conflict+in+africa+pdf`. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/award?keyword=inter+ethnic+conflict+in+africa+pdf In PDF document text
    • http://famexukox.22web.org/dont_quit_poem_meaning_in_hindi.pdfIn PDF document text
    • http://viriruxik.22web.org/el_croquis_aires_mateus_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404965/normal_600459816e63b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468531/normal_5feb8073d9c14.pdfIn PDF document text
    • http://gesizuwumog.iblogger.org/exercise_lower_back_pain.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370294/normal_6001389f0fc9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390350/normal_6048430102f1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452398/normal_602da106257d4.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/loxopudizus/topurixop.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/west_side_story_maria_piano_sheet_music.pdfIn PDF document text
    • http://nirutavikuda.epizy.com/telecharger_ps4_emulator_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/wagakujadumonuxekado.pdfIn PDF document text
    • http://doruxujegajaso.rf.gd/remington_870_express_trap.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/61429889984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d7b7118-0893-44a4-aedf-b5c6c79e1781/how_true_to_the_book_is_handmaids_tale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8b95480-53c7-42b7-b32a-758048ead43d/after_series_book_3_wikipedia.pdfIn PDF document text
    • http://simifumujabiguw.rf.gd/57822484117.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afa816c7-0080-44e2-89d0-e5f558019319/7430209227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccbd31fe-a45a-4335-8db6-0c098e294d86/vugup.pdfIn PDF document text
    • http://sesitalanewu.rf.gd/mediasonic_h82-su3s2_probox_8_bay.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/chalcogenide_rib_waveguide.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/video_player_for_windows_10_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90eda8a2-7a1b-4047-b398-fba90d72f951/simcity_4_cheat_codes_not_working.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_off00010092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10092 5004 bytes
SHA-256: ca3ece26078f5ec247e3dad9570ff2b682aae3af098c11a020fabf02ee718db9
font_01_sfnt_off00011191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11191 10484 bytes
SHA-256: 2d1c9eb9e9729d2c265b5a1faf080b5c8b41984357c0d5baed2305b00aad0d33

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