Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf87eb78fa39fb7…

MALICIOUS

PDF

81.0 KB Created: 2021-02-20 15:19:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c3d60b467367f46ccbd56a6666ba568 SHA-1: 5e0f280ca81cb18b45932227d0836af48b80b776 SHA-256: abf87eb78fa39fb7a8ade1d5a1a220e41664ea592f580970083d937e74221138
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains multiple embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be part of a phishing or malware distribution campaign. The document body, though heavily obfuscated, suggests a lure related to a 'Necchi supernova manual'. The presence of PDF-specific heuristics further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/strik?utm_term=necchi+supernova+manual
    • https://sukodijam.weebly.com/uploads/1/3/4/5/134516983/125d4a0.pdf
    • https://cdn.sqhk.co/bupewazadufa/OjdAHij/ww2_naval_games_ps4.pdf
    • http://bigpleasure.ru/signs_and_symbols_vladimir_nabokov4aphs.pdf
    • https://cdn.sqhk.co/salijuvam/hagfQnR/17285713157.pdf
    • http://newberginvestmentproperty.com/52171336737i1uxt.pdf
    • https://gawirida.weebly.com/uploads/1/3/0/8/130874347/787af0099.pdf
    • https://cdn.sqhk.co/nomelafu/ZBhdjif/exceed_by_money_network.pdf
    • http://kutufirix.iblogger.org/96745564024.pdf
    • https://faxomozux.weebly.com/uploads/1/3/0/7/130775398/5968695.pdf
    • https://cdn.sqhk.co/nivodoruw/jvie0iv/motorola_razr_2019_vs_2020.pdf
    • https://cdn.sqhk.co/buxotulato/gjdWibn/skyscraper_demi_lovato_chords_ukulele.pdf
    • https://cdn.sqhk.co/wifinalimow/ergh9e2/rexekazefonolozilomowizoj.pdf
    • http://itslm.fun/kuterapetadhf3yf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lokabopexo.epizy.com/cells_alive_worksheet_answer.pdf
    • https://s3.amazonaws.com/vekodupiwarobi/messenger_mod_transparent_apk.pdf
    • https://s3.amazonaws.com/dazinibonofobi/guvoxogipatefo.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e089.bin
99228c2d06670cff34937cf691f04d62b81337f553d8a1ff68099b985d42f3db		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE089 5200 bytes
font_01_sfnt_off0000f214.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF214 1800 bytes
font_02_sfnt_off0000faa2.bin
e8114d7cb2b929ee2928d126fd41d01dbd481ec2f70024ae5570d58ceb3de94b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA2 10212 bytes
font_03_sfnt_off00011df9.bin
0387bb648b3930f593af4b298b7ebfed5a01aeac11a28a8dc1b03895237ceb51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF9 17504 bytes

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