Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bd6efd2244d86ed…

MALICIOUS

PDF

76.5 KB Created: 2021-09-05 14:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 56f64d734e8989eed8cca2051e32ae1f SHA-1: 0a20454586e40d3e050b43dbaaf8e17672feadb0 SHA-256: 9bd6efd2244d86eda98d08d441aa13cb20b70edbf5f86415539efcd6480f7db0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, including one pointing to a raw IP address, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://modernplating.com/userfiles/file/rezemowasogenisuxeganud.pdf In PDF document text
    • http://sujitonweb.com/userfiles/files/72671029650.pdfIn PDF document text
    • http://sicilalluminio.it/userfiles/files/39674931181.pdfIn PDF document text
    • http://warungmimpishio.com/contents//files/90974856483.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948d05a6121---nagisevi.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/9e40o5q34bmgacng9cqk3tf0cr/wuvedasidajuvupezedarum.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/jabesip.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160812b26e0b1c---79403080442.pdfIn PDF document text
    • http://bmhs1963.com/clients/7/72/7286fd37811b7a5dece6e69924e4d5ab/File/7459681604.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/13227129106.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/87542075535.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606eaa3beccd5---xewuwibiwonuwala.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0a10bab95---89517153463.pdfIn PDF document text
    • https://jetaime-shop.com/files/pimax.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16108b3eb086f5---negutozekakisakebu.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/9991941309.pdfIn PDF document text
    • http://macphersonproperties.com/clients/876251/File/walotav.pdfIn PDF document text
    • http://lexuspolymers.com/assets/ckfinder/userfiles/files/8010635281.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/q11q05a5ehar7g9dr4rvsp9auj/12353151808.pdfIn PDF document text
    • http://qhzs88.com/admin/fckeditor_upfiles/file/2021072408584180554.pdfIn PDF document text
    • https://camphacement.vn/upload/files/butazogawezexekopukosade.pdfIn PDF document text
    • http://h-p-n.fr/catalogue_dynamique/file/vazimirurolaboxamewe.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/4hlsfbng13239e32mf4o52ink4/13813157313.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/21928146184.pdfPDF link annotation
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=svpwm+nptel+pdfPDF 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_off0000c88b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC88B 17408 bytes
SHA-256: 8c52589d78dbd1caa5388f20a68b8f0d4aef7d548e5bdb3408e3386e249da609
font_01_sfnt_off0000f5a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A2 10244 bytes
SHA-256: 2417a046f69a95fa30fae51cffa44151865c50cbbaf098dd51e7b17633aa5241
font_02_sfnt_off00010cba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1