Malicious PDF — malware analysis report

Static analysis result for SHA-256 574f894a569ea2d8…

MALICIOUS

PDF

85.8 KB Created: 2021-06-30 14:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4ae587fdb572abd67ebe9c4fbb283dc9 SHA-1: 068d3c32b25858876e329a1a9e861c7c21f500a3 SHA-256: 574f894a569ea2d8007acd984b866d12d9230c5ed4d9436663f38dd6e049f1e0
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised CMS upload directories, indicating a link farm designed to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://munord.com/wp-content/plugins/super-forms/uploads/php/files/24b86fcf22e4f9e24c25ccc4ba7fa69d/pelifujalewifekepeg.pdf
    • https://bookatowncar.com/userfiles/file/75854494668.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608716a79b802---2404334775.pdf
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/ac4476a75e3d899d13a32dd937c2cff0/bobotasokikebomamoxorapu.pdf
    • http://vaness-sens.fr/ckfinder/userfiles/files/46380062736.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/7cac76a5c8b48f336d44dfc1f671cf4d/bozage.pdf
    • http://9meclinic.com/ckfinder/userfiles/files/44003318509.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/495a1578c5dcea046a511fafe3d3899c/mozodediduse.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607579d473998---pevubasimimatusonunete.pdf
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/ab4ae12f625ecf2600050ab369d94490/rigoworokuluteteb.pdf
    • http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20210617_751C4E81D0FA250B.pdf
    • http://pphu-joanna.pl/fckpliki/file/73375864060.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/6927163a9e25ebf7d48f52d658eab80d/30752119548.pdf
    • https://tecnicadovolante.com/images/file/piragokejuviruvu.pdf
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/4a7a904338ea4ad6d2fe0e5391dd05f6/xezujepero.pdf
    • http://hoteldazegliotorino.com/userfiles/files/vudetetadeto.pdf
    • https://hogozaty.com/ckfinder/userfiles/files/85908620533.pdf
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/65dcc5494251741804a614a845b80be1/nimaluponijuwilipifo.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16071528bee163---xirelamisulu.pdf
    • https://termocasasrl.com/file/kifewulanijibovafofo.pdf
    • https://chameleoncoupons.com/adgprocessing/uploads/files/69710634767.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/suetipgesknpq27vjv0ccbf5t6/80510435795.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/15fe2fc35eed96ea0ebb288cd2275f51/seturanuxaraz.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/dpcm2lau1kc9qmk72111262c57/28496501472.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cc2b8b8291d---zilekexakekividid.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=what+is+demigirl
    • 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_off0000e741.bin
2ab2fec6f2af774781ce49727eb92a992f5aa1de11fc9236adf282948f3be9dc
pdf-font-stream PDF embedded font (sfnt) at offset 0xE741 10464 bytes
font_01_sfnt_off0000fec8.bin
1d997659a4be78adcc9567e8b075ac08cbe98b9f9bdf029977262ea049e2f931
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC8 19588 bytes
font_02_sfnt_off000130a4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x130A4 16792 bytes