Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7315463b09e59f4…

MALICIOUS

PDF

79.3 KB Created: 2021-09-09 11:13:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: dde351be1920f8ea8bceda8def8a86e7 SHA-1: c98f7a815ca6370f9f1dcbc3ae19e0120fb826b2 SHA-256: e7315463b09e59f4031e8a41f041e332e8fed5fa91c3fb870fc42e29c2f982ef
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating it likely contains malicious content. The presence of embedded JavaScript and a large number of external links, many pointing to compromised or disposable hosting, suggests a phishing or malware distribution attempt. The embedded JavaScript is likely used to execute malicious actions or redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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.
  • 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 http://bio86.fr/userfiles/fichiers/xaxamoke.pdf In PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/dadf5a936ede3b93f7aa28a2368de033/7775893779.pdfIn PDF document text
    • https://digireg.ch/upload/77559109571.pdfIn PDF document text
    • http://cold.lt/userfiles/file/9737971876.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613859199bda9---7725649103.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/temitudozetidiveg.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/161310f1dcbbe9---lusafowegukivepaj.pdfIn PDF document text
    • http://w3-japan.com/js/upload/files/jamaterovoguzukinuxemubo.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139680179b7d---regegoveniwowoje.pdfIn PDF document text
    • https://emmaushuis.org/pages/bigofugokawigenisa.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613688f31cbd9---zenemizedokegulunifadon.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/11723901699.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613835e27d06d---4885300434.pdfIn PDF document text
    • https://akanaymatbaa.com/calisma2/files/uploads/21057126469.pdfIn PDF document text
    • http://movitecnic.fr/ressource/site-image/files/dononadaxotafidoro.pdfIn PDF document text
    • http://freeski.hu/freeski/file/jemazepij.pdfIn PDF document text
    • http://ansonseatery.com/uploads/files/rapobujimujus.pdfIn PDF document text
    • https://siriusdynamics.com/assets/uploads/files/97106893298.pdfIn PDF document text
    • https://marikakozmetika.hu/editor_up/65083961117.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/befibudivadulolaligevas.pdfIn PDF document text
    • https://rails-bg.com/fckeditorfiles/file/retanovirux.pdfIn PDF document text
    • https://phuquiland.com/upload/files/55290108088.pdfIn PDF document text
    • http://studiotecnicobonoli.com/userfiles/files/80286684169.pdfIn PDF document text
    • https://rajnnuhiddje.se/userfiles/file/zukulukumumivuxomuxele.pdfIn PDF document text
    • http://www.chp.pl/ckfinder/userfiles/files/pijoruvaxowarire.pdfIn PDF document text
    • http://cpils.com/userfiles/file/kerideritawuwejozil.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/78520381391.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=dsm+5+pdf+francaisPDF 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_off0000d000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD000 10520 bytes
SHA-256: 0124fdf26f454bb6e9540bbc74acdbedf39f33b324051fae945968e6a92acade
font_01_sfnt_off0000e7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFC 17956 bytes
SHA-256: 332e8a30fa66a76d931113e074db93a933546e997f9df4429baa698b10777c50

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