Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd42d77b28656976…

MALICIOUS

PDF

70.0 KB Created: 2021-03-11 21:04:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: dbe82b914443067ee09e8f8931216c28 SHA-1: ddf09aff2b93b545911c545b93e34177ef3f6a58 SHA-256: dd42d77b28656976ec74eb287322a1d86a5f0c8c03ad0fc414e4b117b9f53634
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'zajinet.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to map resources, aligning with phishing tactics.

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://zajinet.ru/award?keyword=blank+continents+and+oceans+map+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456391/normal_6004f01ea4014.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405925/normal_5fd8f35629fc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487399/normal_5fdb556abc3f1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/096a3e64-cb53-4b12-aa72-b29f911c1cb8/toro_recycler_20334_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/phases_of_the_moon_worksheet_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/primaria_sopa_de_letras_para_nios_imprimir.pdfIn PDF document text
    • http://dasujisetojasel.epizy.com/11095682084.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91479893-41fc-43f6-8fdb-89bff06d8af3/planes_y_programas_2011_secundaria_ciencias.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaf5daf8-9b14-48ef-9da8-c88e52f30bb4/97562881585.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/vcredist_2005_sp1_x86.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/4456357384.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/tiweravib.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/36858031561.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/how_to_paint_niches.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfaf54db-eac2-4a87-8eef-1a371d44a986/pisafovemujabezorogum.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/ccleaner_pro_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/what_is_a_simple_verb_example.pdfIn PDF document text
    • http://fasilew.epizy.com/helvetica_tt_bold_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/disufeko.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_off0000d4a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A4 5316 bytes
SHA-256: d91c232a347f7511fee256fe4227962a563ef88d8855bd309fb6b33e8c7508ab
font_01_sfnt_off0000e6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B0 10632 bytes
SHA-256: e04b456af6ba9fda5dc24476e6159e6c2e461368552c8f8b6d70284e22d2317d

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