Malicious PDF — malware analysis report

Static analysis result for SHA-256 01b3f59a5a51c099…

MALICIOUS

PDF

245.0 KB Created: 2021-07-29 11:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 14bbf232174cd41430e78a175b56d8fe SHA-1: 7821207639e4bd0548ab9b895e9b973555cad199 SHA-256: 01b3f59a5a51c099d2638c3ddd4e45a8ecfcc5ab09b636be86ecc41b00f6fffc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple PDFs hosted on compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the presence of embedded URLs and the nature of the link farm suggest the document is designed to redirect users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6541

Heuristics 5

  • 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.
  • 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://studioingegneramato.com/userfiles/files/xavomuwelinozemikuvax.pdf In PDF document text
    • https://avgdesign.com/userfiles/file/80714212078.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e772566374e---zevaxomanulolulibuv.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d366de3824---vevijobisadidubakug.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b07b2d8395e---12084647369.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/40103014860.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/f3b575448b6fbdcbe0ca7b760f6d6942/lunuboguz.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608a118ca36fd---xopotapinuzotiripeno.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/2ov51r98ogth4mougqt423vph1/nokibuvakekozufezuvolaz.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/sk6hp99bvsds8dccopta5culp1/xabegeba.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d46abae77---5078674004.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/2e8c80059fcc1513d3b86c9aadcd039a/94347780904.pdfIn PDF document text
    • http://chsbicentennialclassof1976.com/clients/c/c2/c283bfa2537a82fb79a670aa087b4bd4/File/tikazanujutipolimetefe.pdfIn PDF document text
    • http://darienhigh69.com/clients/866565/File/41482076795.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/0fe97f31f01691d0eae23773c4a998a6/pexitapegewudutanidegu.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/zabodaru.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d49c3451c---35916324756.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/b0cde90e1d5d90d59b39286c4f5ca142/42200045399.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5aa58303cf---vofewiwuxiroxab.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160a8eed0a5a02---wutesibemadulipilunut.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/pj7h710hgeqpa4k4ug9ronr046/dopijojavoberunukudiboj.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/f5aff8996dc8850b92323c967b694238/kosujedipuzikafe.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/3f4067566b0ae33e4cabde3b2b8a41c7/91913325704.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/53511349477.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16072eb7bd7220---dotiwefonewurot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=latest+news+vw+emissions+scandalPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000329ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x329EA 16216 bytes
SHA-256: 8c2e9d80d580d08964a5048de7b59c27befd741f1c379efd0abbd599686b3e88
font_01_sfnt_off00033f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33F97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000357ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x357AE 10540 bytes
SHA-256: 1f3e568ed60200ef16332958ad04f6332143db05b29f264f18d46efb5d99cf83
font_03_sfnt_off00036fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36FBA 22956 bytes
SHA-256: a07e0bdb1ec59799a0509fa4471854d00b5c3ff15023f922e75a443e2fa53bbc
font_04_sfnt_off0003a86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A86F 8336 bytes
SHA-256: b5932c05a76e3f88b195d289e94403f460be83186a7545ea33ddc919318cfac0

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