Malicious PDF — malware analysis report

Static analysis result for SHA-256 23d520be18dd6ba6…

MALICIOUS

PDF

80.4 KB Created: 2021-04-03 10:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55df5489ccc4ee5b674fde7ea7278605 SHA-1: 960570baaba0647d2495f8497b51882df95d395d SHA-256: 23d520be18dd6ba6057498dc302dd77968102d37170d5a83c8b31ffd3e914201
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and an ML classifier. The document body, though heavily obfuscated, suggests a lure related to a product manual. The presence of external URIs indicates an attempt to redirect the user to a potentially malicious site for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://dafemum.ru/strik?utm_term=apc+be750g+manual+pdf
    • https://kumakisatosoref.weebly.com/uploads/1/3/5/3/135328720/3823109912d5.pdf
    • http://re-prime.ru/had_scale_anxiety_score7mpyb.pdf
    • http://dreabling.online/wofupukupufapiluklkzxq.pdf
    • http://mimiluzaxapurum.22web.org/aghori_vidya_book.pdf
    • https://funogumoduwe.weebly.com/uploads/1/3/4/3/134309977/tosekamuxamatuw.pdf
    • http://joy-todays.online/54293980033kqi5d.pdf
    • http://jupizuginilumop.22web.org/69221654025.pdf
    • https://static.s123-cdn-static.com/uploads/4372987/normal_5fcd42a3cd1f6.pdf
    • https://static.s123-cdn-static.com/uploads/4367290/normal_5fe58fd949451.pdf
    • http://svarka-aurora.online/sejixijevelegelasikogal83eo.pdf
    • https://luludosob.weebly.com/uploads/1/3/4/7/134703274/fedoxo-fezejubirebelez-zukegipimepivos-zogopigitawu.pdf
    • https://cdn-cms.f-static.net/uploads/4481072/normal_6032b12a42e64.pdf
    • http://weraka.online/is_the_porsche_macan_gts_worth_itjnrmt.pdf
    • http://cucoupon.info/sears_water_softener_tank_is_full_of_watereqn9l.pdf
    • http://bifitiguz.iblogger.org/78429365054.pdf
    • https://kibipevanisimak.weebly.com/uploads/1/3/4/7/134770361/lawoxirur.pdf
    • http://topsalon.xyz/ross_stores_openx5pco.pdf
    • http://busivel.xyz/tp_link_n750_access_pointgj9ae.pdf
    • http://cyberghost.store/203228013382j0a9.pdf
    • https://tinulesuse.weebly.com/uploads/1/3/4/6/134689832/fegevowalog-nefebarowubot-ledom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fifuto/sefuloxizinulafap.pdf
    • https://s3.amazonaws.com/zizene/1119591044.pdf
    • https://s3.amazonaws.com/jotogorurekuro/how_many_calories_in_a_medium_caramel_iced_coffee_with_cream_and_sugar_from_dunkin.pdf
    • https://s3.amazonaws.com/dabatisew/website_under_maintenance_html_template_free.pdf
    • https://s3.amazonaws.com/suzixegazunow/50989930688.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_off0000f851.bin
1d4a19bbf017419b15552bddfc3b18457542a4c02e41de13ad67d66495d913c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF851 5676 bytes
font_01_sfnt_off00010ba2.bin
2c682448884462fbab990260e0e61befa6b5b69c4ecef8e4c8039c4aff2d944f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA2 11704 bytes

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