Malicious PDF — malware analysis report

Static analysis result for SHA-256 07715b5d4980f301…

MALICIOUS

PDF

82.6 KB Created: 2021-09-06 15:16:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 9b072cf51ff87d7444e536f599b6786b SHA-1: 2d14d9577052e5d78cf37c30ab6b5fc2be289068 SHA-256: 07715b5d4980f30115a1799d84d203945b8d51a7ef051053619449ed1ca746ae
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lure users to malicious content or phishing sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://www.corazondelsol.es/ckfinder/userfiles/files/27719377834.pdf In PDF document text
    • https://vandolderskb.com/images/usr/vutadobovukifotidubog.pdfIn PDF document text
    • http://guowangcable.com/d/files/75378093442.pdfIn PDF document text
    • https://air-separation-supplier.com/d/files/79847974529.pdfIn PDF document text
    • http://appinaris.net/ckfinder/userfiles/publics/files/90578918287.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/voraxafala.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/lasalavarapolifu.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/161234c1dcf477---49202549894.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083e8fc3d8fb---zagizi.pdfIn PDF document text
    • http://yljczl.com/uploadfile/20210818212458120.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/ajg5435stdtei423gtf4a88574/20311436347.pdfIn PDF document text
    • http://vinacafe-dalat.com/Images_upload/files/lavisuxuj.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b66bcc2f35---10591949205.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16086cecaa4fe5---45723450260.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607c585c70e5b---15992755009.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/ds76sccvlnrd2ob2j5dpibef7e/mujuvazatuguzokejulonagen.pdfIn PDF document text
    • https://ehbo-oostkapelle.nl/userfiles/file/76146469704.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/juzepurukenu.pdfIn PDF document text
    • http://rchs1964.com/clients/5/58/580abc73d3aac4ea3a2bdd7c75327783/File/97386396619.pdfIn PDF document text
    • https://floresdeserrezuela.com/aym_image/files/nijavinikipuvesit.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/4453ec17fc6a98f37a19221a315d40ff/17443747428.pdfIn PDF document text
    • https://dm288.com/slicice/file/xavuxoxidufal.pdfIn PDF document text
    • http://lmyc.net/clients/875386/File/83224679990.pdfIn PDF document text
    • https://sokolzgierz.pl/web/uploads/files/34735910549.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=i+am+yours+chords+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_off0000ddd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD0 10576 bytes
SHA-256: cbbb9f2e20f3de6ae3656751ab73e5fe91b60b7b476b005e5f0fe8b0e6fa95f3
font_01_sfnt_off0000f5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F6 17856 bytes
SHA-256: f32f66da90a20a9f7d64660e817f767295ab26eb2385eb516c26af7d9cbf71d5
font_02_sfnt_off00012481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12481 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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