Malicious PDF — malware analysis report

Static analysis result for SHA-256 98196fff13a91fda…

MALICIOUS

PDF

75.4 KB Created: 2021-09-20 01:00:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 415954fe795f9c0e062880073b864df7 SHA-1: b1449cf8b71e20b260dd1d0b1010e916bc8d1ce2 SHA-256: 98196fff13a91fda48464311506cdc183ffe12203b1c46eb0f0a09e1164925ed
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm designed to obscure the final destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of external URIs and link farms suggests an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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://aylabawadi.ae/userfiles/file/43324992076.pdf In PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/dowaxavenepiriro.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/97760350824.pdfIn PDF document text
    • http://dokturmice.com/ckfinder/userfiles/files/pivofitoduso.pdfIn PDF document text
    • http://intranet.uts.edu.co/portal/app/ckfinder/userfiles/files/53901033444.pdfIn PDF document text
    • http://tdsns.ru/userfiles/file/6776228599.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/vovorobo.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4fb84dfcb---55123507506.pdfIn PDF document text
    • https://sysyanginguvenlik.com/uploads/files/11926877256.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/vufus.pdfIn PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/ranoxotafejenixuworuso.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161349fd9d712d---lidesowukurutidevama.pdfIn PDF document text
    • https://lapakunited.com/contents/files/dixuwa.pdfIn PDF document text
    • http://hanasushichoice.com/uploads/files/jikilowe.pdfIn PDF document text
    • http://www.santamyoga.be/images/file/91028215003.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/13823410606.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/miguxivubulu.pdfIn PDF document text
    • http://dungcucaytrong.com/images/files/filirumegutelusuz.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/161316c98db9bc---80830629662.pdfIn PDF document text
    • http://asvpp.fr/pdf/sogazojogolojob.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/161474f5021d9d---demowawozawemiwem.pdfIn PDF document text
    • https://okud-istra.hr/userfiles/file/67230937267.pdfIn PDF document text
    • http://qbcar.ru/ckfinder/userfiles/files/76433124718.pdfIn PDF document text
    • https://brukspec.pl/upload/file/vegavedez.pdfIn PDF document text
    • http://ibrahimalsada.com/pics/file/17846255697.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/18440991718.pdfIn PDF document text
    • https://art4you.sk/editor_uploads/system/files/suniwuvoduniduzib.pdfIn PDF document text
    • https://tempatpasang.com/contents/files/salikaxowigagesomemowu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=app+cloner+download+mod+apkPDF 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_off0000c2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2FF 17608 bytes
SHA-256: f5e960b493cb24167820f1a1cf54e671cc7a81b5583d80d574b3b29fe562c87c
font_01_sfnt_off0000f00e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00E 10476 bytes
SHA-256: 825acd13b23f319095751235abcb77762fd77f7696dd70bb94afb19d284e8b75
font_02_sfnt_off000107e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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