Malicious PDF — malware analysis report

Static analysis result for SHA-256 b77a2d14cdaa2e4c…

MALICIOUS

PDF

75.8 KB Created: 2021-03-17 20:06:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 85951f2237a0441451923bccee9e27fd SHA-1: 003019461733526afe1d3911fe3f872afd5dbedf SHA-256: b77a2d14cdaa2e4cfc74e440038c66afcb7b868be57ccc11a4cfd9fdbc5a3a51
96 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious URL, and numerous other URLs were extracted from the document. The document body, though heavily obfuscated, suggests a lure related to 'Sindrome de asperger y autismo pdf'. The presence of embedded URLs and the nature of the detection indicate this PDF is likely used for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/award?keyword=sindrome+de+asperger+y+autismo+pdf PDF link annotation
    • http://silekutum.medianewsonline.com/cules_son_los_beneficios_de_participar_en_un_programa_de_ejercicios.pdfIn PDF document text
    • http://liketime.fun/25508229631pj4f8.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/twilight_saga_eclipse_full_movie_download_in_hindi_hd_720p.pdfIn PDF document text
    • http://lipuwisapi.mywebcommunity.org/boraxu.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/rabenabuboga.pdfIn PDF document text
    • http://dadivasim.sportsontheweb.net/zenawotuxisevomedit.pdfIn PDF document text
    • http://b4shop.icu/2089976585br8gh.pdfIn PDF document text
    • http://migipobazu.mypressonline.com/physical_and_chemical_properties_of_alkanes_alkenes_and_alkynes.pdfIn PDF document text
    • http://musomojil.mywebcommunity.org/42926669243.pdfIn PDF document text
    • http://tofugezupeb.mygamesonline.org/what_is_von_mises_stress_in_fea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tigagatu.atwebpages.com/mojazuj.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/25826504645.pdfIn PDF document text
    • https://s3.amazonaws.com/pojikovewijeja/civilization_5_modding_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/bullet_train_game.pdfIn PDF document text
    • http://pekafujojef.onlinewebshop.net/22587943359.pdfIn PDF document text
    • http://novogizeboje.myartsonline.com/weber_grill_light_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/tajetifakagofakabaze.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/72718123610.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/42692716866.pdfIn PDF document text
    • http://zonurupadul.atwebpages.com/the_mysterious_benedict_society_review.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/waxixukozes.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_off0000e852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE852 5532 bytes
SHA-256: b47d2b9a0f59142fc7321893ede21f993f2c6fa8e947855971427a27397bf0c4
font_01_sfnt_off0000fb0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0D 11484 bytes
SHA-256: 00b17f5d243d4b76734791a7036333dfa99c34791871312413bde4995243a2df

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