Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f14fae1c2eac95e…

MALICIOUS

PDF

80.0 KB Created: 2021-09-24 12:22:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 99fe6557fe7d1c3cec691827180cdca2 SHA-1: cafd11eb63ffd94b3fbf8e480a565dfaae6c07d7 SHA-256: 9f14fae1c2eac95ed8abe8a32340021292f531b3e8b1e6c5fb4350d893c501f8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://cructi.ru/uplcv?utm_term=gallery+vault+pro+mod+apk PDF link annotation
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/j220iaplacl2vgenopufnbj082/jaxitabin.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/10185979655.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b3d4ad5f4f---povonatutu.pdfIn PDF document text
    • http://ckudzcssffhhj.handysociality.com/upload/files/lowekegotumewugozojowa.pdfIn PDF document text
    • http://dwornawodzie.pl/userfiles/file/82325336354.pdfIn PDF document text
    • http://www.yemany.com/yemfiles/files/44619381481.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/poroki.pdfIn PDF document text
    • http://sun-green.be/ckfinder/userfiles/files/33814907977.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/rusadoxilejadegu.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d9078702dc---butup.pdfIn PDF document text
    • http://mikol-styl.cz/userfiles/file/riporenagaraku.pdfIn PDF document text
    • http://dfwsedan.com/nbloom/fckuploads/file/82372348911.pdfIn PDF document text
    • http://first-group.kr/ckupload/files/78884907215.pdfIn PDF document text
    • https://careersourceokaloosawalton.com/files/public/52507990048.pdfIn PDF document text
    • http://thefarmatarapahoecounty.com/userimages/jabana.pdfIn PDF document text
    • http://cathugo-catamarans.de/res/wysiwyg/file/48313419842.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b8d771550d---49489343744.pdfIn PDF document text
    • http://alrehabourhome.com/userfiles/files/mozojaguravabuliveb.pdfIn PDF document text
    • http://energosol.pl/images_cms/file/70509458301.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210902105917.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16143b292eb4fa---59527602198.pdfIn PDF document text
    • https://xn--fct8ml6mwue.tw/uploads/files/21463715015.pdfIn PDF document text
    • http://zevkotodoseme.com/upload/ckfinder/files/sonudirezesikinor.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/livilanavozet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD265 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA77 18284 bytes
SHA-256: b533afcee670240907f6b5d5d66cb5fc3f9454abaaee506084ef8580efba8790
font_02_sfnt_off00011a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A20 10600 bytes
SHA-256: c0f43999c212df567a5916b0a548f6a98d7aadc358970118feb20de5bab9745e