Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b9dba79a624cfe…

MALICIOUS

PDF

82.7 KB Created: 2021-04-23 09:06:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ba2124886d00d9673160c0f3255f6ab SHA-1: d0ea9fd61813e1ce2a50b957e2d709d95285e757 SHA-256: 06b9dba79a624cfec78eb3b4291c34d9ff13ac5a2e3fc25639fbcc0890ef6d26
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. ClamAV detection and ML classification strongly indicate malicious intent. The document body, though partially obfuscated, contains text related to job qualifications, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://vilenefex.ru/strik?utm_term=what+degree+do+you+need+to+be+an+operations+manager
    • https://cdn-cms.f-static.net/uploads/4389394/normal_601ff701856e9.pdf
    • https://cdn-cms.f-static.net/uploads/4470543/normal_600c601384c52.pdf
    • https://cdn.sqhk.co/mimofeto/UGL5hhs/the_best_songs_of_the_60s_and_70s.pdf
    • https://cdn.sqhk.co/vewukiziwemi/VJgcjbq/28176860912.pdf
    • https://cdn-cms.f-static.net/uploads/4449181/normal_6034e1e7aeadc.pdf
    • http://nelawetazabuta.66ghz.com/janinopur.pdf
    • https://cdn.sqhk.co/ludibipimilu/dif2hfW/81525928848.pdf
    • https://cdn-cms.f-static.net/uploads/4412758/normal_6014e9ae8cf9d.pdf
    • https://cdn-cms.f-static.net/uploads/4404514/normal_6033f87f5c4f1.pdf
    • https://static.s123-cdn-static.com/uploads/4505837/normal_5ff04c54bb0e3.pdf
    • http://xewixawagupip.iblogger.org/31775000509.pdf
    • https://cdn-cms.f-static.net/uploads/4453100/normal_604b1c1edd94f.pdf
    • https://cdn.sqhk.co/miweguzeg/jjIDkBe/off_road_motorbike_riding_sydney.pdf
    • https://static.s123-cdn-static.com/uploads/4471230/normal_6006c803d7f80.pdf
    • https://cdn-cms.f-static.net/uploads/4478685/normal_5fd661228af7d.pdf
    • https://cdn.sqhk.co/dujujema/RU2tPKL/today_s_weather_forecast_in_philadelphia.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ruzuvune.epizy.com/57374261554.pdf
    • http://xuvagakinev.rf.gd/xiziwevajuwa.pdf
    • https://uploads.strikinglycdn.com/files/7acb806f-c433-4640-a5f1-b4eb407528be/best_quotes_for_tattoos.pdf
    • http://xagewozutuke.epizy.com/newspaper_template_indd.pdf
    • https://uploads.strikinglycdn.com/files/7f62658e-1021-48d3-ad5c-865e599a5bda/planes_y_programas_2011_quinto_grado.pdf
    • https://uploads.strikinglycdn.com/files/5637a514-d582-4c0e-a681-efe3f8807991/do_australian_cattle_dogs_have_a_double_coat.pdf
    • https://uploads.strikinglycdn.com/files/e2f4559d-0e5b-4a7e-b44d-f9112aacf5a5/vasefezapof.pdf
    • https://uploads.strikinglycdn.com/files/01cf4f1c-bec1-4930-a12a-0910e578a414/cen_tech_battery_charger_code_ef02.pdf
    • https://uploads.strikinglycdn.com/files/8011fb48-4f99-4a7c-aab8-71495ce88499/xogaxobukaxud.pdf
    • https://uploads.strikinglycdn.com/files/4ccc6324-f082-4ee2-9361-05abe98a1e88/jisemapirutiminabejoxem.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103e7.bin
01b61300ff680815feb33d83b2cea9c4774e00aff475c765a70e3914306de705		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103E7 5596 bytes
font_01_sfnt_off000116d4.bin
061d3b7dca3981cec63c1ec8d04e7b15e8ca5a8529f228762d8c9b4c2c7c8445		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116D4 11228 bytes

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