Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b7acc0e19c9b5d…

MALICIOUS

PDF

81.4 KB Created: 2021-09-05 01:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 190814943bbd571c8b11beb0420b1988 SHA-1: 745e0d9d3b24ae2e8519e2af96db94639711d732 SHA-256: 68b7acc0e19c9b5debea0af2c9e1bd4e3345121b0afd557ac6d206f8984b79a1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. The PDF contains numerous external URIs, many of which point to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to lead users to malicious content. The presence of multiple distinct hosts and the use of UTM parameters further support the link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/3029274742.pdf In PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/m65l74nopj9o776298cs4c6cn3/fipuvedibusunetofi.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/765031131.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/deforeraxokageje.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9d3e8774a---86551562450.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/86855496962.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/zapadojura.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sofixosemeg.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/2eeop6jvnnsqtia6e8f3vlq6b2/xudevafijetulafoxez.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/71007602420.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/0b32a64e3337fb85e1869856c167f367/76130284111.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfe7972aac---15421936295.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1b1bcbd130---37213633830.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/u4uqtd9mvb6okdfl4cuudjbh35/livemurulemeburesadosizi.pdfIn PDF document text
    • http://crediramasrl.it/public/file/37830022428.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/060956215169.pdfIn PDF document text
    • http://abaj.cz/UserFiles/File/60306550592.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/07/30/file/20210730_001520_186.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/84d28650aa55d49850be66da5b5a4954/39200160438.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/17647263724.pdfIn PDF document text
    • http://stickers-moins-cher.com/userfiles/stickers-moins-cher.com/file/juwivevejozu.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/44336f16fd144fe27c72a3a2fa1f9560/44207619872.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817e891f32f---gagaliru.pdfIn PDF document text
    • https://abeess.com/userfiles/file/vemujezutexa.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/6dbaceba4002703a7e413d71c882f92a/23563324713.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=simple+geometric+proofs+worksheet+with+answersPDF 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_off0000d3cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CD 18488 bytes
SHA-256: 8ff64547a7ee4fd9504f54df7045d66344e927235f42e4a0e0a1d37d63f15a3f
font_01_sfnt_off000103e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFF 11180 bytes
SHA-256: 547e83745392698aa042457f4070c351fcc42c35785a27266f0bcacbf462e067