Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47477d6922bdaa4…

MALICIOUS

PDF

128.3 KB Created: 2021-07-07 03:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: db9e9a8ba5ace7084ecbe3b3667e3340 SHA-1: 12581d247b6b1ebf3a41fee6383c80ba48a128c7 SHA-256: d47477d6922bdaa4681889dc5abdfc6f71995207160fd4aeb4b936b0c5a2bbec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the sheer volume of suspicious URLs points to a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9896

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 http://moreit.ch/productinfo/file/wusarolisibapalanexikazi.pdf In PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/e3992c55f3b1b6269c7506021e726f77/niwirulibulatanoviw.pdfIn PDF document text
    • http://zoop-tech.com/ckfinder/userfiles/files/5456312025.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160700be114df5---laniduwotasekegu.pdfIn PDF document text
    • http://airelimpio.mx/img/editor/file/vulixatotunesoxefos.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aba6cbaada0---28644862348.pdfIn PDF document text
    • http://kalmi.ru/upfiles/files/vaxobidifowogel.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/79187631163.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/14408652436.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8a8a286c0---70055197370.pdfIn PDF document text
    • http://allasclub.com/campannas/file/zexisinoxux.pdfIn PDF document text
    • http://artgraf24.pl/userfiles/file/29165476288.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bae5ec8615a---vaxotubuw.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3d71e3447---7628939178.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/42d156b9b72bb3ccbb6455f7d66dc420/87217343343.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/0a2595e64018d577d865d1a8a8ea5521/83303066207.pdfIn PDF document text
    • http://elesi.eu/fichiers/files/berodijamefizirutoso.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/0a71b0881e0e647d2795f2d8677e6702/kuvafepoxunafomitafutune.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/28057195602.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ff6a93caa5660e28912b04ea1517e7fd/nadonadig.pdfIn PDF document text
    • http://www.asslar.de/downloads/bonerawafuzoxewibedu.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab69df76691---47040445003.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/b7e815c271cb718788bb186236f67873/22022918771.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=kids+competitions+2020PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017c43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C43 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
font_01_sfnt_off0001924f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1924F 10600 bytes
SHA-256: cc5c208bbeb6088b263d594503043f191c1e90de9e80c56f7f2b9130eb2bcaac
font_02_sfnt_off0001aa86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001c298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C298 18004 bytes
SHA-256: 441a2fe2f97de86541f5a8459203c7d3541f15b2a56b2fa1df018a04a92776b8

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