Malicious PDF — malware analysis report

Static analysis result for SHA-256 707568fb1b64752a…

MALICIOUS

PDF

94.2 KB Created: 2021-07-19 05:31:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 88104c626f208a1b35fd5e49eb33d21d SHA-1: 61a2d0316ad25fedb594d573153de1fe7ca623ae SHA-256: 707568fb1b64752ae8f9fb9eace9ac6e02a62fc75c6a0a04c4b2cad9ed151152
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://fcr-fomentoconsumoerenda.com/uploads/files/55392181687.pdf
    • http://przychodnia-felinskiego.pl/uploads/editor/file/dexejuzima.pdf
    • https://arerp.kr/data/file///demirojorirefodo.pdf
    • http://alphasigmaoverseas.com/userfiles/file/8843701990.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/2oh9heu3iujbsmi35ojqjvl9ki/70632591124.pdf
    • http://phuocthuan.vn/images/pic/file/lakewatimumixofu.pdf
    • http://christschoolblr.in/userfiles/file/75231176150.pdf
    • http://gfhs1978reunion.com/clients/56625/File/84467487854.pdf
    • http://imhkayseri.com/resimler/files/jebogezidiwarulowulor.pdf
    • http://bassbasement.org/userfiles/file/35221208120.pdf
    • https://detectiveoffice.net/userfiles/file/damiledifuviduvizivik.pdf
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/48532fed89f669fea7238f2d0bb9f868/tarigitumelix.pdf
    • http://sl-light.ru/design/img/upload/file/46740531047.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c308db8f97c---51372978363.pdf
    • http://dioceseofniranam.org/userfiles/file/48098994001.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160afedc35cdd1---nabugufukinovufalokamil.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb0b81fba6---33225623949.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/95e9d563b38b47f8b227fa95ec6c6db8/zonun.pdf
    • http://bikipvuikhoedep.com/app/webroot/files/editor_upload/files/56191971846.pdf
    • https://iqmuseum.mn/uploads/files/24885110462.pdf
    • https://hiampelectric.com/wp-content/plugins/super-forms/uploads/php/files/e9e88c7b132a37c48beba2550c4f43e8/34623717466.pdf
    • http://ferramentabelleggia.it/public/file/91159270527.pdf
    • http://wenxuezj.com/images/File/bovitifonunixopovonojeti.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/a316e86013ac9b9a9e620f2fd993785d/16331737481.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=what+are+examples+of+single+celled+organisms
    • 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_off00010e9b.bin
dcddf1c3a43d143eed48c57b1f2fa914ce75c35c8b479f8c776018bc5438f128
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9B 11164 bytes
font_01_sfnt_off00012857.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12857 16792 bytes
font_02_sfnt_off00014069.bin
97893eb34d415b671ea55fe67d52ad6b7da8b3a6e0f8db8ae0c739f78c4bbf0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x14069 16700 bytes