Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30948ccb91edfb1…

MALICIOUS

PDF

83.5 KB Created: 2021-08-21 14:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d464a188b861775361e412123546ab68 SHA-1: ea0c06abbb1aceff2699b7f0d610ad14788c1afb SHA-256: d30948ccb91edfb1565e636f0ebc246616f23bab3d486a92204c66c26a2cf851
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, likely intended to lure users into downloading further malicious content or submitting sensitive information. The presence of multiple external URIs and compromised CMS upload links strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://medvor.ru/uplcv?utm_term=le%C3%A7on+3a+vhl+answers PDF link annotation
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f78bd94cb5---48400718410.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0a27eedc4---41719159469.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/526bbb4b05f8cf65f5c59060102bd466/75953835365.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/dce13npo3l0dpcclpb3uomdgtq/96960426050.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609435cf39e0d---mevutitupetonemevokeme.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/33446140b8e46d45d945da07cb88f3b9/66569457901.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ce5dfded22d---42832331056.pdfIn PDF document text
    • https://tramtron.vn/uploads/files/files/65568128187.pdfIn PDF document text
    • https://dcimx.com/files/78068851543.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/etjko9lus23lj9v0rjtocdrdis/53397386498.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/82375444322.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608726d77afea---getomuxasoma.pdfIn PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/77774755827.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ddbfc8a7f4---50635434685.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/temudixajudasefi.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/86946793338.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/ponobiwafomukodidopolaw.pdfIn PDF document text
    • https://gullyracing.it/admin/ckfinder/userfiles/files/runuduteladiladakemob.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7028a72b9---pibekegumuwilika.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/mqcrugqkle5vqjffmi82t28307/tobukujubera.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/48603225933.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/4465336157.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/5afdfc0d7ad3ae865d791617108da841/tefimefanokafijito.pdfIn PDF document text
    • 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_off0000dc07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF419 19368 bytes
SHA-256: bb2b98d5ad77425022a1dfc2e485bc986e815c9b5f3ebb603743aa40c204b445
font_02_sfnt_off000125b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B8 10492 bytes
SHA-256: 242030463385ed053bd45dcbc6d356e4e7cd1db6e07a97e9a1814354411af2bd

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