Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe7a56391184134…

MALICIOUS

PDF

82.4 KB Created: 2021-03-23 09:01:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a38874522c7db70795f44b228b810c2f SHA-1: ab190cd3f902b5730b616c624725475a10327951 SHA-256: 0fe7a56391184134c0ade74dbc4ce3a59e455dc14bc114325982b887fe0cb368
116 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a high-confidence ML classifier and ClamAV detection. It contains embedded URLs pointing to suspicious domains, suggesting a phishing or malware distribution attempt. The malformed stream length heuristic indicates potential exploit activity within the PDF structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://golowaki.ru/strik?utm_term=resgate+das+ra%25C3%25ADzes+culturais+brasileiras PDF link annotation
    • http://magazok.top/dell_optiplex_gx620_network_drivers_for_windows_xpa2ecb.pdfIn PDF document text
    • http://ruszaimclub.ru/katujoxasinanufoxesajurdpsid.pdfIn PDF document text
    • http://dosijefa.mypressonline.com/monubumidejiwunuzu.pdfIn PDF document text
    • http://freehookup.xyz/baluletujirosumobiveluwavhcjt1.pdfIn PDF document text
    • http://everydays.space/certificate_of_authenticity_card_templatek7tq2.pdfIn PDF document text
    • http://lalashoppen.online/the_boy_in_the_striped_pyjamas_movie_onlinewc225.pdfIn PDF document text
    • http://pro-gram.pro/jidedanoveto5dp5o.pdfIn PDF document text
    • http://xepuxupipe.mywebcommunity.org/sixor.pdfIn PDF document text
    • http://doordash.fun/jandy_aquapure_troubleshooting_manualf5epf.pdfIn PDF document text
    • http://fastcreditcheck.info/myanmar_aquaculture_and_inland_fisheries5tnai.pdfIn PDF document text
    • http://firstsecu-paypal.com/xupatugokaziwexufusofive4s4k1.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/joterige/sikovilufurofigub.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/logivuzufiwi.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/nazitafe.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/char-_broil_performance_series_t36g5_3_brenner.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/minekux.pdfIn PDF document text
    • https://s3.amazonaws.com/jugobimuraje/2001_club_car_ds_service_manual_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/60597302408.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/area_formulas_for_geometry_shapes.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/netflix_cookies_firefox.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/vofodalulutobosod.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_off0000e908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE908 5360 bytes
SHA-256: ae60d7d38f99fc3c3da0769c984c36c41e13b302b87219f1f285971352f33c31
font_01_sfnt_off0000fb61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB61 13756 bytes
SHA-256: eef2e0333cb41f6fcdf7763c74cc6e17022484d15d3404eb60a025114c9f0ced
font_02_sfnt_off0001241a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241A 16204 bytes
SHA-256: 31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf

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