Malicious PDF — malware analysis report

Static analysis result for SHA-256 9014875ca6e1d5af…

MALICIOUS

PDF

101.5 KB Created: 2021-08-05 09:57:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 74b79f55ad231e57512c3fb9eaab61c1 SHA-1: 14421e818dea874b31e7bdb7e50ae77673ecbb5b SHA-256: 9014875ca6e1d5af632c04b3859df7d5d0664360bb7945df134ef58fce51a2ae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised WordPress upload directories. The presence of these links suggests an attempt to direct users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • 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://garglob.ru/uplcv?utm_term=ways+to+learn+12+times+tables PDF link annotation
    • http://majstrissmt.eu/www-data/file/liwivonunarabafojakotuwoz.pdfIn PDF document text
    • http://beergolfers.com/blog/images/file/besesejupokopatarum.pdfIn PDF document text
    • http://taiyoaquris.cn/upload/userfiles/files/20210624143650.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/18752424883.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160864cd86fa30---fuvufeturikazorejuk.pdfIn PDF document text
    • http://artdealer.vn/upload/fckimagesfile/a5ec75e65d9663ddc7ff94e5980c90de.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8645b1456---zopipi.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/uhfmp2jh0e34gcldp2lpde9i8h/nejemomusovinazivoderatuj.pdfIn PDF document text
    • http://cementfeet.com/userfiles/file/75860377352.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/63611785094.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/95936030154.pdfIn PDF document text
    • https://astek-telem.fr/userfiles/file/28268949459.pdfIn PDF document text
    • https://doktor-ara.com/userfiles/files/pevisetaganetobixewefulez.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acff4ee15c5---49008157448.pdfIn PDF document text
    • https://eghamatyab.com/basefile/bainbookcom/files/govolepubefobetitenobefe.pdfIn PDF document text
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/c4cd82b0bef0d56ba7eb3702bff6d4c6/68354270221.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/38818328602.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/35720759287.pdfIn PDF document text
    • https://sanvexe.vn/webroot/img/files/senemodubiluvikola.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/a9lg1in0522jpo7880765hfdbi/93957087828.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b973f83f82---50133003252.pdfIn PDF document text
    • http://hzkontejnery.cz/ckfinder/userfiles/files/vewepozudelivutap.pdfIn PDF document text
    • http://alphaconsultinggroup.us/vpw/images/file/27080154542.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/pedozafodajexemibutarali.pdfIn PDF document text
    • https://rivieresoceanie.com/ckfinder/userfiles/files/14184435483.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A5 10688 bytes
SHA-256: e5c61bd1845cd04f053e7a84995c664da4ef9994159fa901991b0ff274d65381
font_01_sfnt_off00012a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001425b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1425B 16664 bytes
SHA-256: 30993bf6b31515ddafac766f602c91a2194b743b1fe6ce4920af1aa641bf3fbf
font_03_sfnt_off00016dc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DC2 17408 bytes
SHA-256: 8c6c20e038aaecbd0c03a5a6d79212878fab3090637daab68ee15cbaac433687

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