Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ece1bd9468005bd…

MALICIOUS

PDF

86.9 KB Created: 2021-09-12 15:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7bf7be6b69690b382bc58da1989325cc SHA-1: 5f3cd9f52878e57ae653c314a2e6c3f3b187589c SHA-256: 3ece1bd9468005bdcec67ed0f5798ea2b608b8eb7ff2892517e604700a19b431
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The PDF contains numerous external URIs, many of which point to disposable domains and are structured as a link farm, suggesting a phishing or malware distribution attempt. The presence of a 'Download Now' lure further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://xn--80aaaaadfwa5aftjhxrkcrg8iwc.xn--p1ai/pict/file/zinuvixodafajuro.pdf
    • http://stilna-ya.com/_userfiles/file/61846385734.pdf
    • http://abwingssuffolk1.com/uploads/files/tugematozalujaned.pdf
    • http://kxnjl.com/userfiles/files/11097090214.pdf
    • http://asustainable.com/global/file/waxodipuzupofid.pdf
    • https://htlexpress.com/ckfinder/userfiles/files/zejuzajinute.pdf
    • http://vaynhe.com/upload/files/fawewasazef.pdf
    • http://zagazzo.com/userfiles/file/lexolozodujamawawu.pdf
    • https://polymadeniyaglar.com/fckeditor/userfiles/file/tobowofatudufimowadawulup.pdf
    • http://domainecomps.com/documents/files/51409227720.pdf
    • http://dj-venci.com/uploads/pages/files/38422740893.pdf
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612f56265fbbd---rikunikibe.pdf
    • http://tl-maskinfabrik.dk/userfiles/file/99353256268.pdf
    • http://almawred-sy.com/files/adminfiles/files/89177585957.pdf
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/gidaropasipupavovoderotup.pdf
    • http://schokobrunnen.com/idata/44983813520.pdf
    • https://swagath.co/new/ckfinder/userfiles/files/38152045711.pdf
    • http://santamariamikado.com/uploads/files/60570977790.pdf
    • https://revive.fashion/upload/files/65823396816.pdf
    • https://www.ewdel.cz/ckfinder/userfiles/files/25947022784.pdf
    • https://rrrc.us/userfiles/file/36484071713.pdf
    • http://www.insight-assessment.com/ckfinder/userfiles/files/vurugusivewemodilijovo.pdf
    • https://edinburghpools.com/contents/files/816832508.pdf
    • http://ministryofrum.com/memlogos/file/86998210285.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=perfect+viewer+epub
    • 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://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_off0000da0b.bin
d7a089cac31dbe0c7b6256e1dc3cf46943ec1add1e685007e32038722d319f57		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0B 4940 bytes
font_01_sfnt_off0000ec62.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC62 16792 bytes
font_02_sfnt_off00010479.bin
aefe62c671d90cbb103558c1eca07dd04641122c2ee9932e5e6798263588bc9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10479 10268 bytes
font_03_sfnt_off00011b87.bin
0ab62c72bf9ceecd84f1182ff10166864953c83312b49a04025323ea4afd27e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B87 18828 bytes

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