Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f450e39d1de1fbc…

MALICIOUS

PDF

81.8 KB Created: 2021-09-22 20:27:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0d6b63c07163ed1adb9114567e9a76ca SHA-1: fbbb40b376d6ec22d02e77884549ee60fdc737a7 SHA-256: 9f450e39d1de1fbcd060d0646dd7d7f9d6626bf67282e7174f5cfa2284cdb5e2
176 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to IP addresses or potentially compromised WordPress upload directories, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of external URIs and a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://italvaping.com/file/febefenuremog.pdf In PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16142cd4d89a92---850768330.pdfIn PDF document text
    • https://cuatudongsaigon.net/uploads/files/robubarifozanixawa.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/nodonuxuvanazafokezo.pdfPDF link annotation
    • http://bangkokmagnetwire.com/ecodev_test/image_system/files/tililit.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1612f46ec83a33---22793707304.pdfIn PDF document text
    • http://altadirezione-consulting.it/userfiles/files/63780635735.pdfIn PDF document text
    • http://vagyonvedelemszolnok.hu/admin/fck_upload/file/68812114879.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132fc62a01f0---22843310769.pdfIn PDF document text
    • http://uni-soar.com/userfiles/file/jobinozagoda.pdfIn PDF document text
    • https://www.theknowledgeonline.com/files/lib/ckfinder/userfiles/files/23203263767.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/fiwavegapipapevu.pdfIn PDF document text
    • https://eastoncn.housemember.com/uploads/files/66022761179.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/vujipadamigut.pdfIn PDF document text
    • http://dongtienlamnghiep.com/upload/file/71833261448.pdfIn PDF document text
    • http://ambvetbrashersclavoghisu.eu/userfiles/files/buzuniwiripodep.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/fevazi.pdfIn PDF document text
    • https://adeptos.clevercloud.pt/images/items/files/83535462722.pdfIn PDF document text
    • http://xn--sanitrprofi-p8a.ch/fckeditor/editor/images/file/telalanogexatis.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca9ccd1a4d---tapuzikaribulama.pdfIn PDF document text
    • http://mycoapaisyl.com/webimages/files/nubojor.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/wegoninefimamuzen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=periodic+table+with+charges+of+ionsPDF 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_off0000dbe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE2 10980 bytes
SHA-256: 572aff2587dfbdca09661d2624b611bc35d163f1cfd01d172829a1901dfb5739
font_01_sfnt_off0000f524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF524 16948 bytes
SHA-256: 9ca6c493372bf6572d2fbc69b6f7e329b9f4240f64b20e391daaa2187355ac44
font_02_sfnt_off00012150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12150 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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