Malicious PDF — malware analysis report

Static analysis result for SHA-256 49e09a2495dc5f8a…

MALICIOUS

PDF

84.1 KB Created: 2021-08-11 18:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a77510841f3edc17094ce3f3b6448791 SHA-1: cb216a0bae58838d4f23bd774b7b6dc3ce3aae17 SHA-256: 49e09a2495dc5f8aee7dcc5131c1e0f24e80576b70cb0d1c517a8da3f35dd0ed
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, a common lure for phishing or malware distribution. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to download a password-protected archive, a technique used to bypass gateway security. ClamAV detection and ML classification strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/o6gkjpi25lergniuj6llveg8tn/10427682378.pdf In PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/ick8pbfkg3djgpbhcegbjotsk6/52771348068.pdfIn PDF document text
    • http://koreaseowon.com/ckupload/files/74881825404.pdfIn PDF document text
    • http://air-ned.com/uploads/files/97435384523.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/piwudilo.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c048f039134---fidexelidoxi.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/daperimuvomup.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed8ff0e21c7---97075337232.pdfIn PDF document text
    • http://monikaknoblochova.com/userfiles/file/79747835832.pdfIn PDF document text
    • http://hungthanhauto.com/luutru/files/razuzobov.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/taxusijovanikaseguz.pdfIn PDF document text
    • https://yuss.it/file/damipavu.pdfIn PDF document text
    • http://daotaonhaccong.com/uploads/userfiles/file/81349821875.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b43dbf48b46---19899615235.pdfIn PDF document text
    • http://weingut-suppan.at/files/44630592789.pdfIn PDF document text
    • http://d4sontario.org/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/94522546469.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c56da4c6895---23069780554.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611162a76d63d---lilomufareserukatape.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ba22726a5a2---36976385912.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/xilawifiguvuvelawiraf.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/wedotavabe.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/2014135305.pdfIn PDF document text
    • http://gardensyellowcab.com/admin/images/file/nidezodolavesimanela.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/41978620d42a1ba2c90634a057588cec/50570163315.pdfIn PDF document text
    • http://abnicum.com/files/file/jegesepitadukemobufu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=como+descobrir+a+senha+do+wifi+ja+conectado+no+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_off0000dfb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB9 11080 bytes
SHA-256: e66d99884fa91d29ac91398f51c1c0b764c11a3008a785ca576d6be26842c0b2
font_01_sfnt_off0000f964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF964 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11176 20116 bytes
SHA-256: 09fc5fe51116c2e3d595cc32e89fa419efdd3ff44c7e630e7ce78f532d4ad6ce