Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf2eca1b02efce3a…

MALICIOUS

PDF

80.8 KB Created: 2021-03-14 05:55:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 50fccaf60ad9fe1cef688f7a23e03b54 SHA-1: a0f5aa87b41bf3bf442476af4962c77d35555e83 SHA-256: cf2eca1b02efce3a9f6062766558ba42314bdb96680f71b98612fb31339a0329
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that, when clicked, likely leads to the download of a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to academic material to trick the user into downloading the payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/award?keyword=statistical+analysis+in+psychology+and+education+ferguson+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4372721/normal_5fc9f75a09209.pdfIn PDF document text
    • http://esportzmlevent.com/nancy_drew_season_1_episode_3_trailerjog0j.pdfIn PDF document text
    • http://naliputa.mywebcommunity.org/40438429816.pdfIn PDF document text
    • http://vknacruckalaikov123.xyz/what_kidde_smoke_detectors_have_been_recalledh1803.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461211/normal_5fe200f415da7.pdfIn PDF document text
    • https://cdn.sqhk.co/gukawaki/nZAicvY/theme_park_gift_cards.pdfIn PDF document text
    • https://cdn.sqhk.co/kidurukazag/aicjcha/32557873967.pdfIn PDF document text
    • http://fruktovik.com/classifying_chemical_reactions_pre_lab_answer_keysu3h2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426571/normal_6017c528ca3fc.pdfIn PDF document text
    • http://sugakibabusu.scienceontheweb.net/irrigation_engineering_by_basak_free_download.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/mukut/53811419387.pdfIn PDF document text
    • http://jokosen.atwebpages.com/19757093690.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/kitufoli.pdfIn PDF document text
    • http://mifotabelimudon.myartsonline.com/67706690431.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/62368174018.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/antique_home_comfort_wood_cook_stove.pdfIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/does_the_5th_wave_movie_have_a_sequel.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/36113652419.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/watiloraxupelitulirox.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/fevenanor.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_off0000fd6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6F 5620 bytes
SHA-256: 72a7516b4dc2d8f3c3837a701adb861d8d279e3fbb77c531e3742625a8441a29
font_01_sfnt_off0001108d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1108D 10872 bytes
SHA-256: e316366aa1bfc45da9c1f2a23a4133777ee33462940ff806766edcef6508384f

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