Malicious PDF — malware analysis report

Static analysis result for SHA-256 2447fa341244d32e…

MALICIOUS

PDF

82.9 KB Created: 2021-06-27 22:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 92776ed2ff7fe966790417e829592a9b SHA-1: 246184e8bea9b02ed5bebc9c19fbd9e00eb6b884 SHA-256: 2447fa341244d32e20800a98c6407f670f45b8371eef500f381fe0b56c6a6ca4
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous URLs hosted on compromised WordPress sites, suggesting an attempt to lure users to malicious or phishing content. No scripts were extracted, but the presence of numerous external links indicates a likely redirection or phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • 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://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c89e5a11d1---67768036428.pdf
    • https://yssnewlessons.org/UserFilesTwo/file/643955948.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607496a406bab---tofijiw.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b5951ed7b---83058827991.pdf
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/53146d2a7d7708fbf7c811818d5b2e29/mesomopakax.pdf
    • http://krzysztofmalec.pl/gfx/fck/file/vividavujopazo.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/av7lng3fvb9spl35qps1sj7tb0/68098268180.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785aeb442a4---gaxawomekixosudalili.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/cf6f118d0ae23f6fbbe9333d74187a11/pisisebupeduxofajinumig.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/af057e4f9543b23b1f7138b66381c355/65477625620.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/togadajifepev.pdf
    • http://decamiones.com/userfiles/file/56836123527.pdf
    • https://arte-salon.ru/upload_picture/vimorelenadidonir.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d017c82512b---55605917914.pdf
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/82a60bbe2dd0798b93a7a971d749c371/xipen.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/uk3mchpo7f7m9796cic7b3vrgp/6224773958.pdf
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/c979b114a5e297761ed3b439682e3f73/jikej.pdf
    • http://agendatourvietnam.com/hinhanh/file/davutebizovovixudafujali.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7bde14485c---85950943035.pdf
    • http://brooklynsmokeshops.com/admin/images/file/81950086640.pdf
    • https://bibliotheque-des-arts.com/ckfinder/userfiles/files/dawaruxanonejofebugumifo.pdf
    • http://solartgaleria.hu/images/file/begodifumenabew.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8083104d2---15501733720.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=compatible+planting+guide
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2f7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F7 16792 bytes
font_01_sfnt_off0000fb0e.bin
1ba5a0cfd188f58d98bd865a9a56e7657232e7786444c6e73a04fad8c02d7e7a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0E 10740 bytes
font_02_sfnt_off00011336.bin
10475d19c20d56091079be57f19a386e087a8a8fbf9de12db59cd0ddcf652ce4
pdf-font-stream PDF embedded font (sfnt) at offset 0x11336 16760 bytes