Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc9cdb3638e2ab69…

MALICIOUS

PDF

71.3 KB Created: 2021-09-21 10:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: efce5ddad8aef1d3622ea2a1172087b9 SHA-1: 685ec517e070e0daa65240424eb49b29013998f6 SHA-256: cc9cdb3638e2ab692af412b621c3064fe1d33936268ceeed54a5f8520ec71be5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, indicating an attempt to execute malicious code. It also features a large number of external URIs, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://madeirashopping.com/userfiles/file/70017078406.pdf In PDF document text
    • http://sdes.in/uploads/10395919204.pdfIn PDF document text
    • http://thegioimaychaybo.com/app/webroot/uploads/files/49848442478.pdfIn PDF document text
    • http://yjeverspeed.com/userfiles/file/81365730556.pdfIn PDF document text
    • http://p-jtech.com/userData/board/file/posigogasemoto.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/lokilap.pdfIn PDF document text
    • http://falconltd.pl/cache/file/57577879065.pdfIn PDF document text
    • http://xn--3e0b556bhrbowi6undva.com/ckupload/files/49287560248.pdfIn PDF document text
    • https://hoavily.com/uploads/files/lejuvevitazome.pdfIn PDF document text
    • http://abwingstop.com/uploads/files/49727565898.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/90597178935.pdfIn PDF document text
    • https://birsamundapark.in/userfiles/files/9630429587.pdfIn PDF document text
    • https://tuoitre.bacgiang.gov.vn/lib/ckfinder/files/17719327599.pdfIn PDF document text
    • https://jss-moms.si/upload/File/vijujuganibojomozawuka.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1614228a8529a7---zejikibom.pdfIn PDF document text
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/danenufezabexe.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/17639a9d4b2e2a9bb1b0954524f07e56/89839755506.pdfIn PDF document text
    • https://salondumariagededijon.com/userfiles/file/74785846400.pdfIn PDF document text
    • http://mama-care.com/UserFiles/file/10181858794.pdfIn PDF document text
    • https://linlinline.biz/js/ckfinder/userfiles/files/varevefezimu.pdfIn PDF document text
    • http://geoass.eu/userfiles/files/lovarozi.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-9-21/20210921052256152097.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/29384913602.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=transparent+wallpaper+apkPDF 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_off0000b9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d1c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C9 10172 bytes
SHA-256: 9ce4b4c9497beaee32c7d17ac3b60a47689a744a554391d5ec845c3996be4d57
font_02_sfnt_off0000e8c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C6 15392 bytes
SHA-256: 666aa1cda5fee05cf37e20dc4ccb033b7639d3ea1041f8a34309d1975b2ef7ab

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