Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ffa61a7258ee403…

MALICIOUS

PDF

86.3 KB Created: 2021-09-10 04:18:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5495bec20f3dcd378938f474e5e7b6e6 SHA-1: 3f5edec7037226e714fa120c4d7984bcda7d5db7 SHA-256: 9ffa61a7258ee403923b846425e460174649b0880bed79961c6f2085cfbc6755
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, many of which point to external websites or IP addresses, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://ahrestygz.com/userfiles/files/20210901_221457.pdf In PDF document text
    • http://terezszilvia.com/images/uploaded/file/14491846314.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/derogaberosi.pdfIn PDF document text
    • http://xn--h1aeekk.xn--p1ai/files/file/guwereralelepop.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/cdde67d66e691f89913fb138cb5426aa/zigujuzinusafikumodimebu.pdfIn PDF document text
    • https://majubesar.net/contents/files/41196852080.pdfIn PDF document text
    • http://thicongdiennuocmiennam.com/uploads/files/32519894329.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210909_183259.pdfIn PDF document text
    • http://kelsenator.com/userimages/6123493665.pdfIn PDF document text
    • http://gyn-ordi.at/myPix/file/26926653847.pdfIn PDF document text
    • https://tranhtreo.com/images/ckeditor/files/90505064618.pdfIn PDF document text
    • http://studioguatta.it/userfiles/files/39343293864.pdfIn PDF document text
    • https://skvacations.com/userfiles/file/liviperevuverede.pdfIn PDF document text
    • http://chretkinia.pl/userfiles/file/86694195298.pdfIn PDF document text
    • http://evrofurnitura.by/elax-furnitura.ru/uploads/files/farevanusonabuwel.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/wizujivelavolad.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/nemasamujata.pdfPDF link annotation
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/bojufugake.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613328fe1e59b---nufudevotipamiw.pdfIn PDF document text
    • http://kbinteriery.cz/userfiles/file/66974595792.pdfIn PDF document text
    • http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sejotomosivomazozatexu.pdfIn PDF document text
    • https://tradingphrases.net/userfiles/files/wekogakajigunuzugitufug.pdfIn PDF document text
    • http://jakpaisanestate.com/images/upload/files/10866487531.pdfIn PDF document text
    • https://pvesc.vn/uploaded/file/37528609014.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161390ae4591ef---51701853067.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=battlefield+android+gamePDF 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_off0000f087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF087 10580 bytes
SHA-256: d146ba0f44e4b4a9e6050b7b343b24e94b1d611fecda7dba4943d4060e0644ce
font_01_sfnt_off0001086d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001207f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207F 16832 bytes
SHA-256: 737ca587e4995923d07eae7ebab6d22c82154eec6b75629a14dba75aa5479147

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