Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf1a51b4912f2379…

MALICIOUS

PDF

84.4 KB Created: 2021-03-08 13:26:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 682766067960a21cc1a585fe623306e9 SHA-1: 9ac35e310c3a199bb28d5e90aa9ad6b2ec341fb1 SHA-256: bf1a51b4912f2379f81a43d4976bb44f7076f23a438baa57256b37600776fb55
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search query for a specific Android application. This suggests a phishing or social engineering attack aimed at directing users to a potentially malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to 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://zajinet.ru/wix?keyword=java+apk+for+android+2.3.6 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4501789/normal_5ff89bdb4eae1.pdfIn PDF document text
    • http://kadulules.22web.org/how_fast_do_rockets_go_to_the_moon.pdfIn PDF document text
    • https://cdn.sqhk.co/ratufewebu/fidUgeg/missing_411_last_podcast_on_the_left.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482636/normal_603183b2134a9.pdfIn PDF document text
    • https://cdn.sqhk.co/bimerolu/ciijiiK/stickman_soccer_2018_hack_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495241/normal_5ffc60a99e814.pdfIn PDF document text
    • http://lemurezagamu.iblogger.org/generic_form_of_enalapril.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375357/normal_5ff9f1eebc697.pdfIn PDF document text
    • https://cdn.sqhk.co/kifateten/ha6NMhb/one_punch_limited_edition_apk_2._4._17.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/johnny_appleseed_story_printable.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446399/normal_5fd2d3b2bfe7e.pdfIn PDF document text
    • http://zigamesixeviru.22web.org/bagawamox.pdfIn PDF document text
    • http://ligumexijigab.getenjoyment.net/55545268116.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460263/normal_5ff79cc5df5f7.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/bakoloj/molecules_of_life_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/chal_chaiya_chaiya_song_wapking.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/how_to_take_evening_primrose_oil_to_get_pregnant.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/supotobelanimirore.pdfIn PDF document text
    • https://s3.amazonaws.com/dogevazapiwediw/92800620784.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001049f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049F 5420 bytes
SHA-256: 4a2fe12ec954e5e10c2ff5c8a48ee14ba1ceef5b63608c6ba9b19be12d39fbc3
font_01_sfnt_off0001172e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1172E 1804 bytes
SHA-256: 559e339ebb012a4711299e9f436f2accabb026881398d3942dea161b76ad44a3
font_02_sfnt_off0001200c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1200C 10472 bytes
SHA-256: 39150edac1b66269779b2505f5bd738228ab0c391f76cdaae88508bd17c3a63f

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