Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd22129d33902e61…

MALICIOUS

PDF

114.8 KB Created: 2021-06-25 21:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 972d00ead7c389219be4d3acfc47ed97 SHA-1: 9d38096d2745dda4a7842064c979c101a6b63981 SHA-256: dd22129d33902e610961036cbd5533db543c0d2021a6cca5f3935944811c0e21
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to host malicious content or phishing lures. The PDF itself does not contain readable text, but the presence of numerous external links on compromised domains strongly indicates a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9666

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 http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16097f6f179f96---puludilufajifivi.pdf
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/efa3bb46261ba336559304f9065387aa/29525831555.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900ad6646d1---2720264149.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/mbhpd75cvsntdu61v0g84pvncj/12370017584.pdf
    • http://artecgroupservices.com/imagenes/file/lilarapekekezuses.pdf
    • http://boathousebrokerage.com/userfiles/file/47858321504.pdf
    • http://vickerycarpet.com/uploads/images//files/poxotopizadarejam.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921ed737c62---jetefowitode.pdf
    • https://zlatartopalovic.rs//files/texetefudoperusagujopewi.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/22b8e4aa9e66e895bcc1af63d6792f42/manovevobanezaj.pdf
    • https://pezenasenchantee.fr/userfiles/file/15446710599.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c14848fd17---83728331985.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160723379f0892---69470802928.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1129d7393---47515791368.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/b4812823151c687416a3a263d1a814ed/nifowatariwozedavupefo.pdf
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/a96d0e7699d450a99dbd2b4f55285ace/wezapef.pdf
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/5ccd1cdca0cb7d666f3bc3775b05cd8a/fideseki.pdf
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/wijafifakemiwizefaworexut.pdf
    • https://emilline.dk/ckfinder/userfiles/files/ximedikikewufezumo.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/57das029o2v80751v1gib6altd/88656874855.pdf
    • https://bancodevida.com/bancodevida/admin/images/image/file/26029508741.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9631ac9e2---zemojuzijidenigiposuwa.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b062263957---33925818489.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/0499a0458c89538f06c58d84e46d3c15/59379988422.pdf
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/abbb568654552f24604db750fee611e2/juzabupatazajopoda.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a36fef355---fenefan.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=the+big+movie+quiz+answers
    • 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_off00014750.bin
6be8c0c042521f5a71df7666660e0ab63b9e07567b17aa495b0122ea571483c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14750 16064 bytes
font_01_sfnt_off00015c5c.bin
1823d5cfca607f9d184a111ea660889af7512bd9a58cd9be8cb70c0671c67c15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15C5C 18032 bytes
font_02_sfnt_off00018abf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18ABF 16792 bytes
font_03_sfnt_off0001a2d6.bin
2e0806b91d23f9567288509985cd78ac692d85365c69e3b656f4b84e41e57230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A2D6 10972 bytes

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