Malicious PDF — malware analysis report

Static analysis result for SHA-256 96527ca0c0e2f50a…

MALICIOUS

PDF

80.7 KB Created: 2021-09-13 14:13:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 080c06074dd006c937504a8a7b548ec2 SHA-1: a115b3ccb95b635bb68dce5655e5fe7c70878e7c SHA-256: 96527ca0c0e2f50a2a1ac4a937e82bbb46e9ef0cda0ae7ff037d5c18e0e598eb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm with numerous URLs, many hosted on compromised CMS uploads or disposable domains, suggesting an attempt to distribute malicious content. The presence of urgency language further supports a phishing lure, likely leading to a malicious download or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://lejonhund.com/upload/sufebozofasoj.pdf In PDF document text
    • http://hizirferforje.com/admin/fckeditor/editor/images/file/23570108250.pdfIn PDF document text
    • http://etre-belle.su/images/file/79151509572.pdfIn PDF document text
    • http://dailyxedayhang.com/userfiles/files/10112854493.pdfIn PDF document text
    • http://saxonrt.hu/img/userfiles/files/26121389011.pdfIn PDF document text
    • https://meritumptt.pl/dokumenty/file/sevamowoludikoxarubikofuw.pdfIn PDF document text
    • https://menu2uplus.com/images/file/nutupimimiwe.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161383ada29e1b---zavepanujikavenomudulene.pdfIn PDF document text
    • http://candleelectricals.com/uploaded_files/userfiles/files/8794988287.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16136f3e71db68---vuromagufolar.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16134865678f56---visufegitivaxusajag.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/31684879064.pdfIn PDF document text
    • http://kbcsisa.com/upload/fckeditor/file/gozimididunepug.pdfIn PDF document text
    • http://akcihlar.cz/userfiles/file/12525966044.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/47852921016.pdfIn PDF document text
    • http://gordostcrista.ru/userfiles/file/vepabo.pdfIn PDF document text
    • http://achilleferolla.it/userfiles/files/javuguwidosufan.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/e275eb49109cb8306ebf7a5dd7839051/fufire.pdfIn PDF document text
    • https://esvigo.com/upload/files/zofogokulebebulubafox.pdfIn PDF document text
    • https://idea-web.ro/app/webroot/files/userfiles/files/22312627989.pdfIn PDF document text
    • http://qhchemicalsfeed.com/upload/files/91255021655.pdfIn PDF document text
    • http://hoya889.com/upfile/files/20210907080707.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=mobile+casino+slotsPDF 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_off0000d5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFA 10256 bytes
SHA-256: cc49fbe6f7fae5b1e32068860da7cefe5618289480dd69e8301f1e8e4c50b3c1
font_02_sfnt_off00010528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10528 18636 bytes
SHA-256: d2865995289f2d975cde6185423ba634d1b4c8f8d2456e2ce6e86eb396feef22

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