Malicious PDF — malware analysis report

Static analysis result for SHA-256 3606c73e75ac6318…

MALICIOUS

PDF

87.5 KB Created: 2021-07-15 15:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e087dba5f3fe3bdeaa1175a651d322d8 SHA-1: 8a04c91daf600a17445844d9203b9f1149b234be SHA-256: 3606c73e75ac63188f80c0552869ad023fdddaf48403dfd3f0914a4ad7e85af7
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to download files from compromised WordPress sites, and includes a visual call-to-action button. The presence of multiple URLs pointing to potentially malicious content suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160927cea3d73d---galifejinabofokukiropus.pdf In PDF document text
    • http://gagutp.com/sa_upload/userfiles/file/20210526054538.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/ed5e6e45feeea8f82dcdfab057956c5c/33129112683.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/39894633199.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/10534983970.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/74d8b381c74135e0b2550ad65d92900f/mogofiz.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/52940746978.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c444bf38a---vikaxumijufeturuv.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/a1nt1gmj1366mdcr6prpav50ml/kapulopudu.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/r3nqbm4c27ugkum5oejd4ppea6/mekudukavaregoso.pdfIn PDF document text
    • https://photojet.bg/userfiles/file/23887758432.pdfIn PDF document text
    • http://quaker1960.com/clients/3/34/346d0055920ff30d27c63167e405b0e7/File/fofofezobi.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/kakozogolekud.pdfIn PDF document text
    • http://cayxaotamphan.net/userfiles/image/file/vumogemavirisadisegav.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/a9bbb33b34831ad507673e8576bdce3b/pabeduzubamemakudajufalib.pdfIn PDF document text
    • http://cokhixnktientien.com/Images_upload/files/fafezogokejomagarovi.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/gamorumepojadotike.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160815deac57ce---setuv.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f091223ab---5965870559.pdfIn PDF document text
    • https://deltarealestate-eg.com/userfiles/file/foguvatovasoxefupiw.pdfIn PDF document text
    • http://millecolori.it/images/file/57365493807.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16079a3c38a139---sejematiz.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/84150450744.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=day+ticket+fishing+north+westPDF 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_off0000f08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001089f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089F 18040 bytes
SHA-256: 1d335ee165cfd85b1b77257280da6175f5c5c03f4f9577342d0889bb31bd4e1a
font_02_sfnt_off000137ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137EE 10864 bytes
SHA-256: e12794945e3aad270a21ffbdab6f1d9a4f726dc3cfb17dcd3b34eb6a3e4374aa

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