Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7568ed5b0a602bf…

MALICIOUS

PDF

167.9 KB Created: 2021-04-05 15:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf7adab51343dd119f22821e886cedda SHA-1: 230145d6ac49e104c8930fd583ef2f5b126f34ee SHA-256: b7568ed5b0a602bf3575c9bf6b72986c84cb52b087fe5e4a459d515f7dadc46a
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though partially garbled, suggests a lure related to 'Descubre 2 workbook answers page 28', likely to trick users into clicking the embedded malicious URL. The presence of an external URI heuristic further supports the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://zajinet.ru/wix?keyword=descubre+2+workbook+answers+page+28
    • https://cdn.sqhk.co/ruwonumatag/jbiggip/14394123022.pdf
    • https://cdn.sqhk.co/dikizumi/mJjc6xS/notapawewududoziz.pdf
    • https://cdn.sqhk.co/mevojazix/dia58R6/dapanojakon.pdf
    • https://static.s123-cdn-static.com/uploads/4445324/normal_5fffbf639fce4.pdf
    • https://static.s123-cdn-static.com/uploads/4488100/normal_5fd08566bb2df.pdf
    • https://cdn-cms.f-static.net/uploads/4417141/normal_6054aa5bebf23.pdf
    • http://wewazer.iblogger.org/lobobamegexirufiniku.pdf
    • https://cdn.sqhk.co/favosejo/fW8ZAK6/instagram_downloader_shortcut_2020.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://16b16ea1-1eac-4681-bfdb-39d0b7b0c60a.filesusr.com/ugd/d6b497_e5ba4f2772254e58883fe2bfa72765fb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c929c9e9-b2bd-4eaa-8117-3512b908789c/38062904951.pdf
    • https://uploads.strikinglycdn.com/files/db80a856-ee72-4004-b6aa-1619ce938a47/what_is_the_importance_of_a_college_education_essay.pdf
    • http://xuvemotoguno.epizy.com/ipad_mini_5_front_camera_not_working.pdf
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_74dd361167c0478cb6591ac4f4716edc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5f100bf3-8397-4f12-bb96-0dcc022f9f3c/osi_7_layer_model_examples.pdf
    • http://futifuzofu.rf.gd/54982182591.pdf
    • https://uploads.strikinglycdn.com/files/fc46e92b-3037-4cf0-872d-65f42c811258/htc_m8_vs_m9.pdf
    • https://e3ba7771-1cf2-49b9-be81-d91832e8ed63.filesusr.com/ugd/bc9675_51e760a6e071446f96fcc799c16bd3fa.pdf?index=true
    • https://eee7329a-c4d5-4508-a8fd-a8ba515f7d9f.filesusr.com/ugd/5ed802_436c29c9ddfd46298401c8db6d5dacd2.pdf?index=true
    • https://510b81f6-be4e-4e40-9acf-3f60af495837.filesusr.com/ugd/5f226b_49e8a1553567436896d143f7d21daea2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7773cd47-fb18-4d78-97e1-b602c6568c89/how_to_watch_call_me_by_your_name_on_netflix.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012788.bin
1db75d90ae4e5b7cf7dbb76b39ec340aa2af81009f3a905eb2904ee0cf40d43b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12788 3408 bytes
font_01_sfnt_off00013504.bin
31719a4e6870b9596c7ce5d728204bf0efa7287cc9e2cdac244862d65d1b6767		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13504 96640 bytes
font_02_sfnt_off000254c7.bin
9399a50ca4bd717b0c1e76369a71d4cea94fbb2661088e1cbc9b3c85778508d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x254C7 5688 bytes
font_03_sfnt_off00026852.bin
2f3772a767fccf660e09dbe7132f7c4c367e94b5899b4dba80b2de9f574f7dcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26852 12048 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.