Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8f0d83dacfebe6c…

MALICIOUS

PDF

89.6 KB Created: 2021-06-29 09:02:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 694b97be0a31826d93c49f78a5970033 SHA-1: a83a6fc8e59c8c2df7d779a70f3adc6114a633ca SHA-256: d8f0d83dacfebe6ccd09886a1e4291a97174fbbc66334789ddaef83e5e5e8bda
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://giolog.biz/images/bulk_images/files/6639275657.pdf In PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f94472e7b5---nokuzekaxusabefor.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16083d7753e734---bunimumekiz.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608477bd16c05---daguloga.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cf6c4de3c4e---23006570753.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/24857932124.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/76248069188.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/271l9587dm9n2qtf5m4orjnb81/68064306146.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cd27093e11c---15831517729.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/f0da0eb71903383d00ae8bac3eb182bd/muminixi.pdfIn PDF document text
    • http://fly.no1-yes.com/userfiles/file/lutux.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/sutezida.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/64371917299.pdfIn PDF document text
    • http://amblesidewindermere.ca/fckuploads/images/file/10157552549.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/e31f53b71ea1106520c07b9d9be41786/2024519661.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f40be86bb---44367143455.pdfIn PDF document text
    • http://qca.ch/userfiles/file/45105535894.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/89649402607.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/fotowud.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/lks5h9jg2pqnfp204l6gft3u5v/leporepened.pdfIn PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/80506906351.pdfIn PDF document text
    • https://hchoanglong.vn/userfiles/file/53064811853.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=dehydration+and+protein+in+urinePDF 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_off0000fe7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7D 16468 bytes
SHA-256: 30170834af68c5b0dd7c6a1e62e3ba14f72060bde5ea15579dedb1ee08369b5f
font_01_sfnt_off00012945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12945 10488 bytes
SHA-256: 6078ad637227138610f706b65ff28f00bf88ce5510bb4ab0da33f6df15348640
font_02_sfnt_off00014115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14115 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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