Malicious PDF — malware analysis report

Static analysis result for SHA-256 39ccae1dd2f6261a…

MALICIOUS

PDF

84.4 KB Created: 2021-07-16 20:56:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c7d6265bc8775fc1253609f8095d2bca SHA-1: f2bd38ac707da96353e6e4e66eefa8ec4fd12fe4 SHA-256: 39ccae1dd2f6261af48a015ee3c98e4359cc0b0eb8a388d74fdf1d26f2f4d682
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, identified by heuristics such as 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM'. These links likely serve as a lure to redirect users to malicious content, potentially for phishing or further malware delivery.

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
  • 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 http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eff8e353594---94388017967.pdf In PDF document text
    • http://zap-interactive.com/uploads/files/69025973872.pdfIn PDF document text
    • https://ive-cal.it/file/24048631867.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/77787564970.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808d4f8ae8e.pdfIn PDF document text
    • https://bompentax.com/quangbasanpham/app/webroot/upload/image/files/niluwolafixid.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/h0b33mjmjf0e6s96nlrk4qrj04/vitaxavatazezugas.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/8d03ds8iecq35iot30bbcds654/23106209322.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/beb9298f1aa77aede5bc07728f56db78/65290158186.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/4a9f6c60c64fe7b754a00aa38a7ee32e/dudamudezopiv.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/zunovapek.pdfIn PDF document text
    • http://healthywithhart.com/res/file/susotor.pdfIn PDF document text
    • https://nutrishop.in/ci/userfiles/files/dirogakel.pdfIn PDF document text
    • https://laser123.com/geektic/files/nibozunerijusa.pdfIn PDF document text
    • http://elskenecologie.nl/files/61080805298.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/jguint111al7logm85pjjori9p/mujisoratoramunex.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb9d375e22---xonafumazotok.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/3h62vm6nsjcbk2knec0a13hsc6/32085574943.pdfIn PDF document text
    • https://saunadlaciebie.pl/userfiles/file/71064314075.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/sddt66tmlnsp8oltc9klqe8kpl/77702555747.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c87fd3ea7b9---wigewobapolivalagupiv.pdfIn PDF document text
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/a9cb74eb427d7c4b2f72325b666e8d87/7689228129.pdfIn PDF document text
    • http://techbico.vn/uploads/image/files/najegila.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=loose+leash+training+puppyPDF 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_off0000e998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE998 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AF 10700 bytes
SHA-256: 0b8cb992ef183014614ddb88090b6248542c61503a26ff2c0fe72d3cea292609
font_02_sfnt_off00011a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A35 16376 bytes
SHA-256: 4e62eca832342c02e92f5103034ef481fdedd5ce7218d32e11f9d7d32ac816bd

Open this report in the interactive analyzer, or submit your own file for analysis.