Malicious PDF — malware analysis report

Static analysis result for SHA-256 52de03128851b39e…

MALICIOUS

PDF

82.1 KB Created: 2021-03-12 16:26:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8237bd8ea98f051dea31bc2f7634cf6 SHA-1: 3027791854514d6d513140cf7b843dd6b2228091 SHA-256: 52de03128851b39ecb097539d848e2b7a35f098193c909b95852876903007ace
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a phishing or malware distribution site. The document body, though partially corrupted, contains text related to 'neoliberalismo' and the wkhtmltopdf application, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xajibur.ru/123?utm_term=que+significa+neoliberalismo+pdf
    • http://pugorot.mygamesonline.org/black_casio_g-shock_5600_solar_atomic_watch_gwm5610-1.pdf
    • http://juzufezike.mygamesonline.org/what_to_wear_to_formal_afternoon_wedding.pdf
    • http://pozuvixa.getenjoyment.net/introduction_to_applied_mathematics_download.pdf
    • https://cdn-cms.f-static.net/uploads/4488807/normal_6044f39e23dde.pdf
    • https://static.s123-cdn-static.com/uploads/4463277/normal_5ff9336a702f9.pdf
    • http://farozemirig.scienceontheweb.net/37656938191.pdf
    • https://static.s123-cdn-static.com/uploads/4503214/normal_5fcf2eafd64a8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/28d873e0-b882-4475-9f4e-01bf1966ae04/wevoma.pdf
    • https://s3.amazonaws.com/xilasisefi/film_fast_and_furious_2019.pdf
    • https://uploads.strikinglycdn.com/files/ff0d1521-ef68-4785-b1f1-310f7779d042/why_would_a_monitor_say_no_signal.pdf
    • https://9539e3d7-93ad-434a-85ac-22bd9bdb82bb.filesusr.com/ugd/df7b34_4d118dffd48c4f02987f4edc9aae0acd.pdf?index=true
    • https://02796127-04ec-4c85-b270-c6f7310ebb18.filesusr.com/ugd/ce0e6d_69f3c29df467464e98dce8beac941804.pdf?index=true
    • https://s3.amazonaws.com/rokuwapesu/carnatic_music_instrumental_audio_free.pdf
    • https://6a8c3f3f-5248-4e80-80e0-4bf2c04f72bc.filesusr.com/ugd/8b2c09_c97514f2f4c24f6dbda5bbd452abbdb4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/efe5ffb6-a8f8-4e7f-9680-81af245011ba/animal_farm_george_orwell_summary.pdf
    • https://7f58a6d3-5723-489e-a2bd-17fd91e1ddd5.filesusr.com/ugd/655495_79606a41e6da4f32bee682954ae19f34.pdf?index=true
    • https://uploads.strikinglycdn.com/files/baabd7cb-0363-41d0-9bde-a4a56c682e83/74353654605.pdf
    • https://f6ea5e03-7e7c-4dce-82ee-fd5d223759ef.filesusr.com/ugd/d203ad_04020671419d405f9457db305397b460.pdf?index=true
    • https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_d3841869a509478cae89657714da2852.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5d772fb2-8ea8-47fd-93ca-60e6721de68e/4531720898.pdf
    • https://be934b08-0dcc-4e2e-8de1-c3c1c32dbfab.filesusr.com/ugd/d5415a_9b691214169f45fc8188f7060b8f961c.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f441.bin
2debf2f29112cc708867ec056c79572db6ec3493eacfead5b7e5be13bb299f57		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF441 5476 bytes
font_01_sfnt_off000106b5.bin
57ab35cba550b946296874aaebe40e2c3fbe1fe30c1c88d237b945b96bb22fdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106B5 11232 bytes
font_02_sfnt_off00012b3c.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B3C 4324 bytes

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