Malicious PDF — malware analysis report

Static analysis result for SHA-256 500772c50f2d8d34…

MALICIOUS

PDF

72.4 KB Created: 2021-03-07 16:44:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 564de30d2ec2dfaed4c38a7fac43e3be SHA-1: bfadc6bb5bb79b6e776564d81e16b5a704cd0036 SHA-256: 500772c50f2d8d344077749b15035020cccdb49a2b4dcea041a11f70ad5acbb0
116 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a callback phishing or tech-support scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. While no scripts were explicitly extracted, the presence of embedded URLs, including 'https://mezovuduw.ru/wix?keyword=princeton+ma+library+museum+passes', suggests an attempt to direct the user to malicious content or gather information. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://mezovuduw.ru/wix?keyword=princeton+ma+library+museum+passes PDF link annotation
    • https://cdn.sqhk.co/velabolo/jhijaia/heroes_of_71_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/pajijolabalu/fItTU5a/civilization_revolution_2_plus_trophy_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413851/normal_6038d2514c2e7.pdfIn PDF document text
    • http://summ-green.fun/pisaridawowabofinevuxizqjmn3.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/nlijCYp/mars_conjunct_uranus_in_scorpio_synastry.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448535/normal_5ff4291a6999f.pdfIn PDF document text
    • https://cdn.sqhk.co/firataxoworo/VkghGMP/university_of_alberta_acceptance_rate_quora.pdfIn PDF document text
    • http://www-sfr-fr-monespace.com/hungry_shark_world_all_sharks_and_skinsnhupn.pdfIn PDF document text
    • http://sawuzelipo.iblogger.org/nationalism_in_india_class_10_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lojadisexudo/ljflhcK/fekeseg.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/tikoweravisixu/52265650495.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/22977410336.pdfIn PDF document text
    • http://jozazesebogole.rf.gd/83651318278.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/fury_warrior_pvp_guide_classic.pdfIn PDF document text
    • http://sedisukaviz.rf.gd/how_to_reset_emerson_thermostat_1f83c-11np.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/how_to_draw_anime_books_online.pdfIn PDF document text
    • http://zezevefo.rf.gd/wakesemamixikotide.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/fifufatavuvel.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_off0000df07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF07 5320 bytes
SHA-256: 2a471e58c7faa821b8a25b2ed9978c0bbeca1a31c645867c837cdd3703c78cb5
font_01_sfnt_off0000f109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF109 10412 bytes
SHA-256: 125c6c6700ce7e017def1ef10f3e84f1cff38031a617d0445499a49bba54b302

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