Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d69be229aa83bc…

MALICIOUS

PDF

70.5 KB Created: 2021-09-22 17:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d7e0070effedb30cf63a7fba12e17ff2 SHA-1: 441c23eabd81c62ccdf693f546a8f1e698f3f695 SHA-256: 54d69be229aa83bc00472fe3645ff783f526d07135eba2668531b4a1e847a597
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to other PDF files hosted on various domains, many of which appear to be disposable or compromised. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a tactic to obscure the true destination by using many low-reputation domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6611

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.
  • 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
  • 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=grand+theft+auto+san+andreas+obb+file PDF link annotation
    • http://auxerretv.com/content/public/file/87978095676.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/72361831996.pdfIn PDF document text
    • https://h016s5or78-du3.com/contents/files/tomemifanukowuwesogi.pdfIn PDF document text
    • http://fujieshubao.com/zk/UploadFile/file/2021090503481773499.pdfIn PDF document text
    • https://cicimanis.com/contents/files/15907781265.pdfIn PDF document text
    • https://barrier.exma.cl/ckfinder/userfiles/files/bezewolulugofedarisa.pdfIn PDF document text
    • http://shceping.com/upFile/photos/2021-9/file/38397774453.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/jitixejafef.pdfIn PDF document text
    • https://buddhaart.in/userfiles/file/38796105540.pdfIn PDF document text
    • https://acconpriti.com/ckfinder/userfiles/files/kidipufitujumadefaz.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files/jumabaw.pdfIn PDF document text
    • http://miryangpension.com/FileData/ckfinder/files/20210912_C9E8438A1E8E6130.pdfIn PDF document text
    • http://medeeatour.ro/mm/file/vadipazetanerotodesejon.pdfIn PDF document text
    • http://slovoveri.org/userfiles/ralegukorudogojafaj.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/vufemedixumojame.pdfIn PDF document text
    • https://www.sibirprokat.ru/ckfinder/userfiles/files/57160572193.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/161362ab8eeb44---wakigizojademexanow.pdfIn PDF document text
    • http://rcp-ranstadt.us/files/gaxubelatadekeboresaruxu.pdfIn PDF document text
    • http://archiw.gbpopatowiec.pl/img/upload/files/82932394740.pdfIn PDF document text
    • https://swaarm.de/app/webroot/upload/files/bafosusemomexa.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb67d05777---53366544628.pdfIn PDF document text
    • http://www.kroonzuivel.nl/ckfinder/userfiles/files/rikepeposiruxubafi.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/03f6bb04f14d261d4c6019f3cc8852b8/sidumukiwuwugonatigupotoj.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5d647f330---19996571233.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD835 20340 bytes
SHA-256: 269babf475feb31ffc4ea3d8eaf15f16124a7be4fb0f148ebb991d48515f4157

Open this report in the interactive analyzer, or submit your own file for analysis.