Malicious PDF — malware analysis report

Static analysis result for SHA-256 30fcd5e6741a064a…

MALICIOUS

PDF

69.2 KB Created: 2021-09-24 19:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 48daabc7557bdf5ef459a6886887ff57 SHA-1: 35d95901647bfaad15614169b68633c24f85d286 SHA-256: 30fcd5e6741a064abe9bb4eaff80407532707369bbc1e201f5635b8ade9dd945
196 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple disposable domains, a common tactic for distributing malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download a password-protected archive, a method used to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://dryoucosmeceutical.com/userfiles/files/78078134925.pdf In PDF document text
    • http://mtcnx.com/upload/fckimagesfile/66711352911.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613b62f31bb8f---15801023247.pdfIn PDF document text
    • http://studiomarazzi.eu/userfiles/files/xosaturijezujaxapo.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c5ea534ed3---89812751902.pdfIn PDF document text
    • https://kottayammedicalcollege.org/CMS/ckfinder/userfiles/files/18677859617.pdfIn PDF document text
    • http://studiotecnicoligioni.com/userfiles/files/47401117597.pdfIn PDF document text
    • https://perfumes.dropship-tracking.com/userfiles/files/56587702963.pdfIn PDF document text
    • http://allier-genealogie.org/File:/punonatefenirejewegen.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/161301ffc11ad3---99075425432.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/77339223263.pdfIn PDF document text
    • http://gbfrjournal.org/pds/userfiles/files/zuzataxenobufedupexulaf.pdfIn PDF document text
    • http://dae-young.kr/upload/fckeditor/file/gutoreferogozuvobo.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/72d87944b0e18b77b1581d1980eb830f/dodowavebadome.pdfIn PDF document text
    • https://careersourceokaloosawalton.com/files/public/kotosawodenidilogiz.pdfIn PDF document text
    • http://lnhaihui.com/userfiles/file/20210919071202_1422451872.pdfIn PDF document text
    • http://moscowprice.com/content/xuploadimages/file/54074453597.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/vphgddpd83rkqdverkjb8tu0gh/13808417234.pdfIn PDF document text
    • http://eurolocal.info/sites/default/files/images/file/raroju.pdfIn PDF document text
    • http://agilesolutions.in/uploads/xebozumag.pdfIn PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/rarejipapenakomiwag.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149f0376745a---82971704600.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=turning+off+notifications+androidPDF 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_off0000b214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB214 14740 bytes
SHA-256: 842b1553e786372e43691899cf5821d107ba0ffea5307cfc1abf34988a18599f
font_01_sfnt_off0000d721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD721 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ef38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF38 10536 bytes
SHA-256: 9b9fd450e68497a9b57222661d47c5fbfe1c8fc2d3e0c3be8a3e92baf5168e71

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