Malicious PDF — malware analysis report

Static analysis result for SHA-256 2892fba51713889f…

MALICIOUS

PDF

72.5 KB Created: 2021-09-04 03:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6a452c7429acbebf61a45816b757cea9 SHA-1: cefcce81b0f5b267314c15e55975a839945cdedb SHA-256: 2892fba51713889f64a6323cd95a394a4ba55c20b6f12deecead6b0764f39526
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm with numerous URLs pointing to compromised WordPress sites and other domains, suggesting an attempt to distribute malware or engage in phishing. The presence of external URIs and link farm heuristics indicates a redirection mechanism, likely to a second-stage payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/tvkbdnqdug3s7arfb3qq3tdl6h/7471561998.pdf In PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/tvia30sujti1fgtovlajmoj13r/zasupilopigigupunuleba.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/73036751406.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/4ec70a603db9898cff3f479cfa26ceea/pomebutivemi.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/e89b071028c8fb9222cf71b2fa893cca/92528624154.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/lomofuvumarigojuwibiz.pdfIn PDF document text
    • https://zoomkish.com/basefile/zoomkishcom/files/dolesinaniwemikirafakozub.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/4e2ae1d532a65309c62a5d9cd5ca58c9/viwesavaxurotirawux.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160dcea4eb430d---60241271813.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/vasiwam.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096fd8025b86---zajeleguboxeb.pdfIn PDF document text
    • http://harc-ias.vn/Images_upload/files/pisasetovakuneg.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/cebf7dc2dbabdb7ed3e1107f8ff9d831/ratifovegefew.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/6334446a23969174938ca7c52ffe1f28/volen.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/petexodipakenebimori.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/xiwate.pdfIn PDF document text
    • https://rajakeempat.com/contents//files/70779305093.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/44632581240.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/e99c769d610a0f6372e4b6b429e90887/35186565138.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/i1k8vus8oc6gp27so80nah5g4s/7645728717.pdfIn PDF document text
    • http://galgalesh.com/userfiles/file/10255527289.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/piser.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/rexamagomegen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=8th+grade+common+core+math+word+problems+worksheetsPDF 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_off0000b9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9D8 15720 bytes
SHA-256: 56d0fc8822738f22b2cee9a99ca8fc934180009fe149f408c62fa51d4610b3de
font_01_sfnt_off0000e1cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E3 11300 bytes
SHA-256: 8a622c80d56251e0fe99c28055e1725c3a96386648a64872775a4d7b4711f871

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