Malicious PDF — malware analysis report

Static analysis result for SHA-256 185294f0d4157139…

MALICIOUS

PDF

83.9 KB Created: 2021-09-20 11:00:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 56711cb16c6b94b17f8f1f30ab1cbe26 SHA-1: 274098dca89cd301a0f27436b61634268a00c6c0 SHA-256: 185294f0d415713985a6f672e2607387198e1bd5b532513670195e7dd2d39fe2
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users. ClamAV and ML classifiers identified this PDF as malicious, likely a phishing or trojan distribution attempt. The presence of external URIs and link farms indicates a potential for exploitation and delivery of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://schokoladenbrunnen.de/idata/regivubefujujawuguvijewux.pdf In PDF document text
    • https://cbdc.co/uploads/ckfinder/userfiles/files/95890100688.pdfIn PDF document text
    • http://ipai-bg.eu/img/file/93693489885.pdfIn PDF document text
    • https://charming-dc.com/uploads/files/202109190323591696.pdfIn PDF document text
    • https://sgicorp.com/userfiles/files/5138973919.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1614127bf4f334---97053392076.pdfIn PDF document text
    • http://gianenricofabro.com/userfiles/files/durizizejulom.pdfIn PDF document text
    • http://saatgaamkansarasamaj.com/admin/uploads/files/nesosurafarafase.pdfIn PDF document text
    • http://hosungtour.net/FileData/ckfinder/files/20210919_93B7E3B2A552022F.pdfIn PDF document text
    • http://allefrgycg.news-read.com/upload/files/78101467548.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f57d194716---58665815272.pdfIn PDF document text
    • http://zespolbahamas.pl/zdjecia/file/1043410036.pdfIn PDF document text
    • http://vit-physio.de/file/18489736322.pdfIn PDF document text
    • http://maristaslardero.es/userfiles/file/maleme.pdfIn PDF document text
    • https://masihpt2.com/contents/files/62447100481.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/79885739612.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613cee1b7ed6d---25895651270.pdfIn PDF document text
    • http://kesifveotesi.com/files/38351376610.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/13869804342.pdfIn PDF document text
    • http://revize-elektro.info/UserFiles/File/kelamito.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145e01b5dfee---13047958641.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/22861993943.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614636e05a5f3---kakazugururizejipexom.pdfIn PDF document text
    • https://dichvumoinoi.com/ckfinder/userfiles/files/67521880206.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=taxi+sim+2020+hack+mod+apk+downloadPDF 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_off0000db9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9C 10932 bytes
SHA-256: 3cac4d3788c867ced03612a17849c85f65d2d8523b0f70b2f6577f32f10efe58
font_01_sfnt_off0000f4d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D4 20680 bytes
SHA-256: 93c6ca598772439fb5647c78ed7a85f030a93ae6687131fae4aaf71707e90c40
font_02_sfnt_off00012a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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