Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c979a099f00c461…

MALICIOUS

PDF

129.1 KB Created: 2021-03-14 05:57:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ea7cd84bcfcd7e3de13831b411b8f4c1 SHA-1: e54e2cc2b9e19b7d946c1886de3f91de012b2dbb SHA-256: 6c979a099f00c461167da90e5537d76673e03fc6203af6809674226cdfcbbef6
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains multiple external URLs, one of which is presented in the document body as a lure for "core java written exam questions and answers pdf". The presence of embedded URLs and the nature of the detection suggest it is designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/award?keyword=core+java+written+exam+questions+and+answers+pdf PDF link annotation
    • http://nokasosozigof.mypressonline.com/schwinn_bicycle_computer_manual.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/how_to_replace_a_lost_north_carolina_drivers_license.pdfIn PDF document text
    • https://tirusagoxavux.weebly.com/uploads/1/3/5/3/135329940/2104926.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/VC2ghTq/68392463392.pdfIn PDF document text
    • https://cdn.sqhk.co/rezebarowed/aOgikal/44873768038.pdfIn PDF document text
    • http://momarivido.mypressonline.com/warcraft_2016_sequel.pdfIn PDF document text
    • https://gavuwexis.weebly.com/uploads/1/3/4/7/134772394/zenos_rajebokavuxif_metupovosoj.pdfIn PDF document text
    • https://zevebijupaxize.weebly.com/uploads/1/3/4/7/134754497/siwuxopob_jozuwajaja_fepatagelinag_paxulenegogi.pdfIn PDF document text
    • http://jiviruke.iblogger.org/71449198902.pdfIn PDF document text
    • http://nupewijanetari.medianewsonline.com/kezokelojogesixoga.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/gelawiweza/xujunitaxo.pdfIn PDF document text
    • http://dovobol.epizy.com/nekogijatoxebolunutipumu.pdfIn PDF document text
    • http://duzivuzox.epizy.com/backup_chrome_bookmarks_manually.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/18851086018.pdfIn PDF document text
    • http://tifavamifikas.myartsonline.com/eureka_boss_smartvac_4870_bags.pdfIn PDF document text
    • http://manosotidokef.myartsonline.com/77832423570.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/chicago_manual_of_style_sample_bibliography.pdfIn PDF document text
    • http://keregimuw.onlinewebshop.net/how_to_make_probability_distribution_table_in_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/left_sided_neglect_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/cumulative_effects_assessment_guide.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_off0001b9af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B9AF 5480 bytes
SHA-256: 5817ea5411e8ef5a93886f1ae5e7f51564a0a24b0b07e660ea4681e6bc356be1
font_01_sfnt_off0001cc54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CC54 12312 bytes
SHA-256: e3b8fc9157362e5794a094d3e143ea1c8aee18b1b80999f0bdf49268651a524f

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