Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ffda2b4692430ef…

MALICIOUS

PDF

75.7 KB Created: 2021-09-04 05:24:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fa34e2df1c6ccc00073e40189faf7e46 SHA-1: 69d8ef5955c205d7dbd6f749db08450c73083a20 SHA-256: 9ffda2b4692430efe9486841b19d35e73074c6c8aca4e75e47c192e082995a3a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple URLs hosted on compromised WordPress sites. These links are likely designed to facilitate phishing attacks or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc8550ac36---25200834142.pdf In PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160781a35a34e9---71348324984.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/riijq12miltth6ak90td1osrbr/buvukedujiluzaruwulel.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/99833024105.pdfIn PDF document text
    • http://mueblesdepladur.es/1/userfiles/file/51376136728.pdfIn PDF document text
    • http://blackshirts1962.com/clients/f/f2/f245580d3072b78cda2271cf7a7e3f61/File/zivirugagi.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd153b0783---38805917242.pdfIn PDF document text
    • http://jd6618.com/jd6618/file/2021-8/file/LwpCms2021_08_29_04_15_42_9168.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/a207f71263c83d8afebc5880b8493064/6788150348.pdfIn PDF document text
    • http://daotaonhaccong.com/uploads/userfiles/file/37145988527.pdfIn PDF document text
    • http://derma-dts.de/files/file/kenokufexofuxewinamolozu.pdfIn PDF document text
    • http://klpa.net/userData/board/file/75433224882.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e68b9a636---30719308130.pdfIn PDF document text
    • http://abwmechanicsville.com/uploads/files/42345339366.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5a8777655---58154997157.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/284cc0f658dc16b4598721d778962dc9/56050367775.pdfIn PDF document text
    • http://www.sealjet.mn/pictures/files/16047769747.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1ca487a70d---wonofovopifen.pdfIn PDF document text
    • http://upbfassadenbau.com/upload/file/noxexojewoxezutuxu.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/a29b299d89ef5b5c0735b5f14440686e/15014525178.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/rixakazezujeb.pdfIn PDF document text
    • http://uniqueaddress.in/crm/files/48517806471.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=vision+de+los+vencidos+resumen+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC110 10656 bytes
SHA-256: 970668d9f93d1e7d2ad438615200148df4841b53aa15b3c0fabb71cc89df9ff9
font_01_sfnt_off0000d971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD971 18084 bytes
SHA-256: 5119870aebdb85bbe5e2506c75b6d61d300709e7985947d2e8da2571d3ef9fdc
font_02_sfnt_off0001072d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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