Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c825c76c1c47d10…

MALICIOUS

PDF

72.0 KB Created: 2021-03-27 18:31:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1588c0676a343aadc88c4f934e72589a SHA-1: 937df4b97ad6650bf804008ccebf6736c88a2b1d SHA-256: 0c825c76c1c47d1094752a76514e0e865b334686b2563f44d202a445093516ed
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI pointing to a suspicious domain, identified as malicious by ML classifiers and ClamAV. The document body, though heavily obfuscated, suggests a lure related to 'maps' or 'awards'. The presence of external URIs indicates an attempt to redirect the user to a potentially malicious site for phishing or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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://bologen.ru/award?keyword=carrion+crown+interactive+maps+pdf
    • http://viewcreditscore.info/kayarian_ng_mga_salita_worksheet0u5up.pdf
    • http://pollsexpert.com/vazatonukt0mlz.pdf
    • https://cdn-cms.f-static.net/uploads/4454977/normal_6051c71411052.pdf
    • http://pet-guru.shop/zuwokukofibuzibav5ekz.pdf
    • http://getveran.site/adobe_illustrator_trial_for_windows_10pnjhx.pdf
    • https://static.s123-cdn-static.com/uploads/4409098/normal_5ffc693cbe64b.pdf
    • https://cdn.sqhk.co/kigimole/7jb0Thg/al_kalam_surah_e_shams.pdf
    • https://cdn.sqhk.co/sevafeluba/midulhe/kofomufo.pdf
    • https://cdn.sqhk.co/batumozi/dxeheia/butajixad.pdf
    • https://static.s123-cdn-static.com/uploads/4475559/normal_5fec5aed547d0.pdf
    • https://cdn-cms.f-static.net/uploads/4487423/normal_603562ac4f80c.pdf
    • http://sweetygirl.club/29275129404xsi2.pdf
    • https://cdn.sqhk.co/lewonuvaxu/04E56ib/amazon_a_to_z_phone_number.pdf
    • https://cdn-cms.f-static.net/uploads/4413117/normal_604acc8f3707b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2d6e6567-0c78-4d59-926b-6e19d99defdc/50045368576.pdf
    • https://uploads.strikinglycdn.com/files/875435b9-94a0-4bd1-bc7e-bd288dbaec19/what_is_the_egyptian_word_for_light.pdf
    • https://uploads.strikinglycdn.com/files/c4cdde8e-2b0a-41e0-a5d9-85b6c5b9d944/the_great_depression_and_new_deal_unit_test_32_questions.pdf
    • https://0c2a7d7b-be9d-4ef2-a94c-09ca905cc17d.filesusr.com/ugd/7d21c0_3fc0fb61ba3842f088e9eabe43699e69.pdf?index=true
    • https://d3919fa5-c020-464c-a773-72e456e10464.filesusr.com/ugd/29136f_8a2f440b918c49a59b92c6615e76991c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1f6d2e74-32b1-478d-94bb-37724fc53057/how_to_stop_the_habit_of_biting_nails.pdf
    • https://uploads.strikinglycdn.com/files/bb0c93e1-b0ad-4363-8428-d8f0456cd3a7/business_mathematics_and_statistics_lecture_notes.pdf
    • https://uploads.strikinglycdn.com/files/83e34664-4cdf-489d-a6f3-a228a6aa5e61/58202160422.pdf
    • https://uploads.strikinglycdn.com/files/69c8aae3-d642-47ed-b5b4-ef65a8d69b70/79422034652.pdf
    • https://f4b9ed98-44c1-44e6-9966-d9817cd43de7.filesusr.com/ugd/9ced5d_aef6093908bc4383865c8d325e390c37.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d923.bin
7412201f50c462a070343fa658d2f05181d86681b0342fc257926db0ee5524b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD923 5324 bytes
font_01_sfnt_off0000eb3c.bin
b2a7559932299de88ed26ccd5c0aab62f10193c9428f8af4d65463802c9c3462		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3C 10960 bytes

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