Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d419e5541696743…

MALICIOUS

PDF

75.5 KB Created: 2021-09-01 15:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2479db2bf1925abc5a84cd7d53646bcc SHA-1: 73d0f5229677c2388ec1f6e6d0c1ad531b847315 SHA-256: 2d419e55416967434997c185d7789ffa81e6fa27e1c120869871209a2c34070e
176 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a likely phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The document body is heavily obfuscated and does not provide clear textual lures, but the heuristic firings clearly indicate a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://abofahed.com/userfiles/file/53340104452.pdf In PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160acfd248a79e---famulagobolejemozumavawew.pdfPDF link annotation
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16114fe95ea859---taxogizerebuzakidizepow.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607dba437c3ec---11800818568.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/96496525956.pdfIn PDF document text
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/lovawaxos.pdfIn PDF document text
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/alr6dhm092ggakmtrmtack2kp5/tolakusubirin.pdfIn PDF document text
    • https://arerp.kr/data/file///63052729726.pdfIn PDF document text
    • http://prabashproperties.com/ckfinder/userfiles/files/20446690441.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/mipixu.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/daeb057aeff5764d48652b01de2b7229/josedudix.pdfIn PDF document text
    • http://lindseyderence.com/userfiles/files/96365528019.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/fexekifoxuni.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/popukabadiludibewanofibeb.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/rerokujozifemugiguw.pdfIn PDF document text
    • http://homestationrealty.com/userfiles/files/81095327800.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074313d427b4---dapekukenilepejot.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3fcb220c5---mopizudutufezoparazulot.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/nadifuremanuwapariwul.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b676391db---sumixusikiludim.pdfIn PDF document text
    • https://bayihoki99.com/contents//files/rotuzojufujiwuf.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160790d59af58a---tinofupigikode.pdfIn PDF document text
    • http://ecoaga.com/documentos/file/12775027372.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/50d14c470cab8d20cb485d424ddd46eb/mefajigagelebixizazigi.pdfIn PDF document text
    • http://think6.net/ckfinder/userfiles/files/20210803094814.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+write+a+good+research+objectivePDF 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_off0000c740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC740 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF52 15164 bytes
SHA-256: baf8ededd00a768b62d12de78ce306f2ef187841146baa04ca27e145fb21f2c7
font_02_sfnt_off0001056f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056F 10912 bytes
SHA-256: e1fc3e202ec18940e84661bb3fe8e3c0bdb7560c8b20d270e0c2750145154de2

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