Malicious PDF — malware analysis report

Static analysis result for SHA-256 80914d9ee919f706…

MALICIOUS

PDF

75.4 KB Created: 2021-09-03 14:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2b1bf547afce3a6762a2db82b9602793 SHA-1: 5177201587b59e31cc9554d94b0071e0d0f20498 SHA-256: 80914d9ee919f7065bc1e41988ca7c21c50fb0897cf7e52cdccbe4b665330561
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document functions as a link farm, directing users to numerous external URLs hosted on potentially compromised or disposable domains. The presence of multiple external URIs and the link farm structure strongly suggest an intent to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://pixomot.ru/uplcv?utm_term=quran+sharif+in+bangla+pdf PDF link annotation
    • https://eventpro-kontraktorpameran.com/uploaded/files/81323296016.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161150e2b7cc4c---malagudofobenapigofodal.pdfIn PDF document text
    • https://coherence.cz/userfiles/file/zejare.pdfIn PDF document text
    • https://eberli-medical-supply.ch/upload/file/gulajasaduraxatanu.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c494daa9bb5---51780938513.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc0f5b93ee6---86443044631.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d22c37f84---dugakiletenol.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/11232e1ab8043078cc400baef9541f30/11329205009.pdfIn PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/31427048287.pdfIn PDF document text
    • https://gencatakan.com/upload/file/bagezu.pdfIn PDF document text
    • https://myphambambi.com/webroot/img/files/sezuwakosug.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/sovivodoxizafa.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/tafax.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/fefumosulagisajove.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/1bc3737901b78a2d56387a8ddf93d0fd/tiridimunegulelaxax.pdfIn PDF document text
    • http://csc-020.com/userfiles/file/20210802021509_ypyrcc.pdfIn PDF document text
    • http://honderhotel.com/UploadFiles/FCKeditor/20210812090928.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081c8aee61c8---fumuzigipom.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/61263282992.pdfIn PDF document text
    • https://dadrarad.ro/userfiles/file/42494026755.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/14e8d6441c7dccf8c368372f6347034c/44476886283.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_off0000c0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0E6 10728 bytes
SHA-256: bf485bbdddb093d981779568692918c17ca8c48259d33f4a6a1b585863afff11
font_01_sfnt_off0000d8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FC 18476 bytes
SHA-256: e18bd56fe54b9b04a070af4e4d45235ef614042ba4c0f1fcfe3b3552f8a0a92f
font_02_sfnt_off000108a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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