Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ba7493481eeac6…

MALICIOUS

PDF

84.8 KB Created: 2021-03-29 20:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9532a2b796787069e9e70be65ecbf9e0 SHA-1: 423c2578962755b6b3d5e5c496a2648c59fdbb76 SHA-256: 93ba7493481eeac646d95cc126f09d35c0d1355c4e21e8ba01a908ada5086ccb
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of external URIs and the nature of the detected threat point towards a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://zajinet.ru/award?keyword=arithmetic+progression+and+geometric+progression+problems+and+solutions+pdf PDF link annotation
    • https://cdn.sqhk.co/jatobeguji/D8cggit/crew_apparel_for_sale.pdfIn PDF document text
    • http://jolixasij.sportsontheweb.net/fesowok.pdfIn PDF document text
    • http://rentline.pro/asian_cup_2019_schedulepbilx.pdfIn PDF document text
    • http://gakmancreatures.ru/how_to_sync_a_harbor_breeze_fan_remotexisf2.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/ik3hfib/luxobubopumigivelifel.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/hhTgfge/rebel_racing_apk_obb_offline.pdfIn PDF document text
    • http://tixaman.scienceontheweb.net/53871480145.pdfIn PDF document text
    • https://cdn.sqhk.co/sikudile/hAKAEja/jagomuxepewof.pdfIn PDF document text
    • http://reduslim-italiaufficiale.site/77634942863kafze.pdfIn PDF document text
    • http://rowexusaje.mypressonline.com/cardiovascular_pharmacology_concepts.pdfIn PDF document text
    • http://streichpack.online/effective_workplace_communication_marsha_ludden0fdm4.pdfIn PDF document text
    • http://mignonette.space/human_resource_management_job_description_and_salaryabln6.pdfIn PDF document text
    • http://tezibif.mygamesonline.org/the_autobiography_of_benjamin_franklin_dover_thrift_edition.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/boduxatavepe/2018_custody_calendar_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/new_english_albums_2018.pdfIn PDF document text
    • https://13adc596-845f-4f4a-b539-e2c04a0a4b5a.filesusr.com/ugd/6e2da7_58e5e89f221c4cffa1b44060d1877ee4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dalava/69721740716.pdfIn PDF document text
    • http://faxiruvud.myartsonline.com/appsc_groups_previous_papers.pdfIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_4a10eb952138445188158f4368aba2ec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/arkansas_guided_elk_hunts.pdfIn PDF document text
    • http://pezamax.myartsonline.com/dalatebabina.pdfIn PDF document text
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_33925b88f32546acb7a823cf58883b60.pdf?index=trueIn PDF document text
    • https://b304dada-1952-41b2-af44-d16a3232bb3f.filesusr.com/ugd/c19c34_434227e3a6f54691bebef9e0f30283cb.pdf?index=trueIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BC 5700 bytes
SHA-256: cb4ff42fbf4192db2fdae5e508f18cb225d2c36b9375ebbe38cb34df1cc43165
font_01_sfnt_off000107f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F1 11440 bytes
SHA-256: 693de46f57c87eab6d5c009447a1d11068ccececf88639d51546a60381e3bd50
font_02_sfnt_off00012f18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F18 16228 bytes
SHA-256: a255f30d1853ad0b0e55509660838502a8d329b0eec2ec8fa0475d077bdb109c

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