Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa679e6140d1fd02…

MALICIOUS

PDF

78.2 KB Created: 2021-03-24 05:51:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 276bc0093d8a30d77cc1def2d8814db1 SHA-1: 2117b15134aa11cbc6fb82732bbf917b209056f3 SHA-256: aa679e6140d1fd02fcc97dec1fba6f3c09490b31eb7d9ddb3745cc646c2c3f65
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware download site. The document body, though heavily obfuscated, suggests a lure related to a 'study guide'. No scripts were extracted, but the presence of embedded URIs and the overall detection profile strongly suggest a phishing or malware distribution attempt.

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://kuzutuzo.ru/wix?keyword=love+sex+and+lasting+relationships+study+guide
    • https://nigerizebamogut.weebly.com/uploads/1/3/4/5/134596745/fibudexagujimoji.pdf
    • http://coolstudent.space/extreme_car_driving_simulator_2_hack_downloadkmrvu.pdf
    • https://cdn.sqhk.co/marivefigus/EhgnMgU/37016239564.pdf
    • http://nesobaka7.xyz/badokifosonemupizigijue99kv.pdf
    • https://masagefila.weebly.com/uploads/1/3/4/5/134505888/deneku-webasizo.pdf
    • http://tomolijoponix.mypressonline.com/suwokotuzeg.pdf
    • https://cdn.sqhk.co/sowanigog/3hggegd/63283125759.pdf
    • https://repawuwo.weebly.com/uploads/1/3/5/3/135313919/3118492.pdf
    • http://bomaduworofa.medianewsonline.com/diablo_2_armor_runewords_by_rank.pdf
    • https://cdn.sqhk.co/bapulofuw/ajdjjif/12283143451.pdf
    • http://faceskinagainbeauty.xyz/javascript_template_literal_object630za.pdf
    • http://vuwefedope.sportsontheweb.net/zaweguwomerutojegala.pdf
    • https://jidakizunulub.weebly.com/uploads/1/3/1/3/131381167/vujudifidatiduwize.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vexabimumemig.atwebpages.com/86173983357.pdf
    • https://s3.amazonaws.com/gulapore/shopping_list_template_for_preschool.pdf
    • https://s3.amazonaws.com/xalasawu/dupelaba.pdf
    • https://s3.amazonaws.com/wexoteluwag/que_es_un_archivo_autorun_exec.pdf
    • https://s3.amazonaws.com/liluvad/81552310803.pdf
    • http://zedofaxuboz.onlinewebshop.net/60074026786.pdf
    • https://s3.amazonaws.com/wazorixekunafob/busukitojowimokobules.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f24b.bin
fdd310fa2c3a7e69643f49208694bc1f7764435e45a0a6b2d90117267c561659
pdf-font-stream PDF embedded font (sfnt) at offset 0xF24B 5392 bytes
font_01_sfnt_off000104b0.bin
508a09b650a1e42be2c51dd9f6a390f91df2819faca9ad91503d7e247facc3a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x104B0 10888 bytes