Malicious PDF — malware analysis report

Static analysis result for SHA-256 f191dcf6aad37252…

MALICIOUS

PDF

78.3 KB Created: 2021-02-15 01:31:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0b40763a1745af999b0c647ab53159eb SHA-1: 9795c7a9465d6c1a1eaeb96da49adfa96b2904ea SHA-256: f191dcf6aad372521f58da014a815cc230a602ff36777932aa6e6804341f0123
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://baarspo.ru/wb?keyword=numerical%20analysis%20bisection%20method%20example%20pdf', suggesting a phishing or redirection attempt. The document body, though heavily obfuscated, appears to contain metadata related to the URL's search query, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://baarspo.ru/wb?keyword=numerical%20analysis%20bisection%20method%20example%20pdf PDF link annotation
    • http://mirror-x.org/98387995158vid6i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481280/normal_5fd04a8dc55ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410433/normal_5fdb38565274d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452377/normal_5ff4f11047441.pdfIn PDF document text
    • https://cdn.sqhk.co/rovifatira/dhghaij/yeezy_350_v2_carbon_sizing.pdfIn PDF document text
    • https://cdn.sqhk.co/farosexuto/5M9FNjn/35443117105.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418991/normal_5fdaf4e196430.pdfIn PDF document text
    • https://cdn.sqhk.co/koporikog/cqijSgj/godzilla_defense_force_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/desavusomo/hgpMjbq/97316838145.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452839/normal_601b617f63c53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450417/normal_5fdb3ff92e2a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391315/normal_600f1abf659f2.pdfIn PDF document text
    • https://cdn.sqhk.co/raserijene/icFGR4j/fikuzofidixajanalimo.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/himXjjN/hair_cutting_scissors_kit_pakistan.pdfIn PDF document text
    • http://aicberg.net/77902113592kvip5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499979/normal_5fdc5b3b722af.pdfIn PDF document text
    • https://cdn.sqhk.co/rinugezig/gge7uii/superhero_creator_lee_in_boot_camp_crossword.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467286/normal_5fcd5fd0351ba.pdfIn PDF document text
    • http://livecopyrightverification.com/9630430660457apu.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/widetunipet/antivirus_android_app_review.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/marvel_future_fight_new_version.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/bawufa.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/all_of_me_piano_sheet_music_advanced.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
    • 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_off0000da73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA73 5672 bytes
SHA-256: 646f472a049a176869c15dc12bdafbd9b9ff8286fb367b8c0636ec4ad15bc40b
font_01_sfnt_off0000ed9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9C 11824 bytes
SHA-256: 9cd0be7cb16e7f3c16ac1d7973755c29c0e839ba86915000418e0a59ee67a274
font_02_sfnt_off000115f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F8 16148 bytes
SHA-256: 2b9a58732e62f9b2661c60555366173efb7a0f448c83249b96d7082548fc6b3d

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