Malicious PDF — malware analysis report

Static analysis result for SHA-256 aba19ee84fbee8fb…

MALICIOUS

PDF

76.5 KB Created: 2021-06-27 12:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6602ea2aca1deb6a684b81e21934885e SHA-1: 5d7b9bc104bd0e190933849782b97fdc0bfdf915 SHA-256: aba19ee84fbee8fb84f5337ca43c1979900cd67a77da2a30e0bda2d4e23ed464
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress installations and disposable hosting. These URLs are likely intended to redirect users to malicious content or phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/f8178ff56a7a5ae93dbdb12f1751c249/kunepubabizawamisebofa.pdf In PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/03afac08735ebea5aac91e9de5ec2db6/xuzekenurusonifategomi.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/09193bc30f626d0e1e6b85226187d147/zoxudazitefixamalop.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/fufuvogofomofuli.pdfIn PDF document text
    • http://abpaluso.com/upload/file/20888231251.pdfIn PDF document text
    • http://vaughanreunion.com/clients/7/7c/7cfe0b8ff6d5e3136a6575a9b258a09c/File/76438724256.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a949e6e8370---virawe.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/62656038685.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc22d62618---nozevosatojeput.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bec457ecd0---tegowadilatuxobetuvuve.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/khmd6h53tct8nnlstkat4624f6/81958777210.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b03764eeee---89692499226.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/gelenebezefug.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/d8af4880749c1c9089bed4e067e2a3f6/rimajode.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/141339b24b3119596e4e98f11d7f9ef9/10325879014.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a44dbc1eebd---88413774573.pdfIn PDF document text
    • http://taskentcompany.com/userfiles/file/lusax.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/muxuragerasojuk.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/15955105293.pdfIn PDF document text
    • https://dm288.com/slicice/file/rojunijawudoz.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076127216fc7---difuwulutubozajegawijo.pdfIn PDF document text
    • http://ibshop.gr/uploads/_uploads/files/63152022653.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/82986636383.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=which+is+larger+pint+or+quartPDF 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_off0000ca33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA33 16156 bytes
SHA-256: 0228b971f120c4141e320745a34feb3504a643752cf88fd290689b330d0b2cef
font_01_sfnt_off0000f3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DC 10892 bytes
SHA-256: c722cfca57175770e757ff96cf1c937d87700a404a5ea2e1069e58db91e8345b
font_02_sfnt_off00010cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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