Malicious PDF — malware analysis report

Static analysis result for SHA-256 0408cfee626dc8f4…

MALICIOUS

PDF

83.6 KB Created: 2021-08-11 02:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 6eafe1a7d66c59ac3082819e53ba0a46 SHA-1: a16629322b502aee1312dcd4c06f3d871771687c SHA-256: 0408cfee626dc8f46bd14f759618e9af325ff36eb9567949cba32a5258a790de
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS upload storage or disposable hosting, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the PDF structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://www.amanuttarakhand.org/ckfinder/userfiles/files/labowosevupobinofagiko.pdf In PDF document text
    • http://studiolauramoschini.it/userfiles/files/kivubizaripuvuwol.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/xadutoviriwepifonalage.pdfIn PDF document text
    • https://hnhaa.com/userfiles/tnejp//files/morazateninogut.pdfIn PDF document text
    • http://deltastal.ru/userfiles/file/golisisurulegukotageva.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/rojidazorerifa.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/73292891086ccacfec2f4984e3adcff3/xikujekuvike.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/22168456507.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/51543622324.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/1225639985.pdfIn PDF document text
    • http://orkoien.com/userfiles/files/sepupefina.pdfIn PDF document text
    • http://ekmeta.lt/failai/file/24746503375.pdfIn PDF document text
    • https://fundacjaartfreeart.pl/userfiles/file/sawemegizusip.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/df81888c1a0ec7602628c7519784481f/36112092965.pdfIn PDF document text
    • http://cerezolorente.com/files/cerezolorente/_repo/file/kewimepol.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/36683836853.pdfIn PDF document text
    • http://shs1977reunion.com/clients/41590/File/kinuwilivuwebokesona.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc40473327---fubemepaveluleme.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a519faac0dd---xisatobat.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/siroz.pdfIn PDF document text
    • http://ballstonfamilymedicine.com/clients/861402/File/rogonobinogizu.pdfIn PDF document text
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/35922747241.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d94ee3a9eb---7843640895.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///2021051462422_751318527.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+to+connect+chamberlain+garage+door+opener+to+wifiPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFC 16084 bytes
SHA-256: c27fafdda185be2695e99106f22849c7304d1d4eff2202c3575f3979fbde09eb
font_01_sfnt_off0000e22d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22D 16964 bytes
SHA-256: 5c9319c4b831c28f3506f8a933a5138c8bc2f19dc7f2e38ecd34578ca0091bfd
font_02_sfnt_off00010e62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E62 11116 bytes
SHA-256: 61e0106e20ee0de8f5a1dc90f70f9254b98c8b4b88bf52ede848673cc9966104
font_03_sfnt_off0001279f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1279F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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