Malicious PDF — malware analysis report

Static analysis result for SHA-256 f396afcc7552c110…

MALICIOUS

PDF

85.2 KB Created: 2021-03-24 10:50:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e111a89fddaee83f97d261ea3073a21e SHA-1: 6f72feae53af7f3cd26d14dab3ce7233f716fa34 SHA-256: f396afcc7552c11045024e9f3679514b55131e84d663689cdb627b4a9b0338cf
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. An external URI heuristic points to a suspicious URL, which is likely the intended destination for the user, disguised as calculus questions. No scripts were extracted, but the PDF structure and heuristics suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jacksth.ru/strik?utm_term=calculus+multiple+choice+questions PDF link annotation
    • https://cdn.sqhk.co/fasisela/jiib944/66782000070.pdfIn PDF document text
    • http://kovamuwaropepu.getenjoyment.net/rijaneliguwolufu.pdfIn PDF document text
    • https://cdn.sqhk.co/kufusivekogo/ifAl1ce/hocus_pocus_25th_anniversary.pdfIn PDF document text
    • https://cdn.sqhk.co/jijasitov/juIjg4o/56251450622.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/hiAYicK/occupational_health_and_safety_act_2004.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/how_to_set_stopwatch_on_casio_watch.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/fzCUAjb/31417220437.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wagenugeti.epizy.com/sap_outline_agreement.pdfIn PDF document text
    • https://s3.amazonaws.com/wemofodi/rifazufa.pdfIn PDF document text
    • http://sesilav.rf.gd/comma_splice_run_on_fragment_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/342b464f-5518-4216-977e-9642fe1b46c2/clases_de_mapas_mentales_ejemplos.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/17663196117.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e00e62ae-f810-452b-9877-c960ea1b9b7c/the_secret_language_of_birthdays_relationship.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d50b18a-0d92-42db-ab3f-ff7dc79e4642/setewigosiz.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/24277082049.pdfIn PDF document text
    • https://91953a53-6f32-4f2a-9b2e-0f954541ff31.filesusr.com/ugd/dad90e_97562857b0964c54bd66181afae9a98a.pdf?index=trueIn PDF document text
    • http://wozunitififut.epizy.com/cookie_sheet_cake_icing.pdfIn PDF document text
    • https://f45985d3-969e-4a4b-a16b-f92b7c881388.filesusr.com/ugd/20da2d_95f02eda358b40659fd4fbcc4f1da473.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/fejuxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef7e3d36-6858-4a06-a038-2fb26eecb066/lady_macbeth_movie_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04504f94-c180-47da-b015-fb8d1e4adee7/xitisa.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/data_checksum_corrector_file.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF482 5108 bytes
SHA-256: e1b6024c796d591e29f6aed82a86cea2a6dbea768bc1778b6428af0f3881d389
font_01_sfnt_off000105bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BD 12552 bytes
SHA-256: dbd67b756f33b3353c62664ad6c4dc3a22fc0998d51812a761759f31df01eeb4
font_02_sfnt_off000130d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D3 16296 bytes
SHA-256: 2088c5fd26fd419179924dde641f1ceb5d7e63989d79532f5f97884cfe5ab96e

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