Malicious PDF — malware analysis report

Static analysis result for SHA-256 830f00a433068583…

MALICIOUS

PDF

71.2 KB Created: 2021-04-05 16:12:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 076a406c19048c5b5a18c4b99e335f4c SHA-1: d257e7a4ce129ae35d47c6f56f1d25e87b4d81f5 SHA-256: 830f00a43306858376d12007690155e9b2bf943aab69f30175ab07eab304e5f4
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a potentially malicious domain, disguised as a search result for academic content. ClamAV and ML classifiers have flagged this file as malicious, specifically as a phishing trojan. The presence of external URIs and the overall classification strongly suggest a phishing attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://pelibifir.ru/wix?keyword=stats+modeling+the+world+ap+2nd+edition+answers
    • http://bezerojiw.scienceontheweb.net/51796983575.pdf
    • https://cdn-cms.f-static.net/uploads/4410030/normal_60683bec075a1.pdf
    • http://vexezujuzas.scienceontheweb.net/38091893427.pdf
    • http://sunufosabupes.scienceontheweb.net/xoxebuzofikivo.pdf
    • https://cdn-cms.f-static.net/uploads/4373788/normal_600b0e0bdbe62.pdf
    • https://cdn-cms.f-static.net/uploads/4446496/normal_601b6d294c4a0.pdf
    • http://kosonetibekub.medianewsonline.com/belogazevogeduxuxap.pdf
    • http://zugapuvu.mywebcommunity.org/does_elena_gilbert_wake_up_in_season_8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/gezizefefififa/psychology_by_david_myers_9th_edition.pdf
    • https://s3.amazonaws.com/titugome/how_to_access_my_voicemail_on_samsung.pdf
    • https://s3.amazonaws.com/tometubufimopim/52436169444.pdf
    • https://s3.amazonaws.com/dujepav/warafipewojijiv.pdf
    • https://s3.amazonaws.com/mibiwivanetuj/chiamata_annullata_android.pdf
    • https://uploads.strikinglycdn.com/files/81eb4b31-ccad-485e-a2cc-98f95414805e/the_wrath_and_the_dawn_comic.pdf
    • https://s3.amazonaws.com/somamere/icai_articleship_exam_admit_card.pdf
    • https://uploads.strikinglycdn.com/files/a44f78ec-7056-41cf-968d-ca04e30331ea/photo_essay_examples_for_elementary_students.pdf
    • https://uploads.strikinglycdn.com/files/6d9cb9f8-96d9-4f06-a15a-dc2bf9b12edb/21434208366.pdf
    • https://uploads.strikinglycdn.com/files/053ffad7-c90b-45ff-921a-53f8c4fcee04/mikuzasizesanegovojigurav.pdf
    • https://uploads.strikinglycdn.com/files/4a09337e-7f4d-416a-968e-b9bc93f38f8a/80772964269.pdf
    • https://uploads.strikinglycdn.com/files/529f4d08-e65a-4c33-92ed-450556903a93/zewabinurefubagav.pdf
    • https://uploads.strikinglycdn.com/files/aa50dd6f-6d2e-40ce-a142-6e4334c237d9/actividades_matematicas_segundo_grado_primaria.pdf
    • https://s3.amazonaws.com/bejeseja/37469796427.pdf
    • https://uploads.strikinglycdn.com/files/a8c8c4a8-d9fa-408c-b158-d235a73aaa16/kiwivobewirevab.pdf
    • https://s3.amazonaws.com/vanatul/superman_wallpaper_for_iphone.pdf
    • https://s3.amazonaws.com/xeruxaxer/guided_and_unguided_media_geeksforgeeks.pdf
    • https://s3.amazonaws.com/vudivuzakal/lalepulowudijixogozuke.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb0e.bin
743d085210d50fabade4399bfd95c34c8c263e3d6dbf3374decab8039ae676e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB0E 5488 bytes
font_01_sfnt_off0000dd8d.bin
a8dc0ea579285fe4665c166988a4a7be1396299d169e081ee9352318a72cb726		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8D 10340 bytes
font_02_sfnt_off000100d5.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100D5 4324 bytes

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