Malicious PDF — malware analysis report

Static analysis result for SHA-256 888f1f6bfcf5a95e…

MALICIOUS

PDF

100.9 KB Created: 2021-09-07 18:11:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1537925b98c3d3e028cbfc0f673011be SHA-1: f5c7e638317a4408502850c6f3849e179cde1512 SHA-256: 888f1f6bfcf5a95ef0597b7fcc887017399e0ba245db6ef239e427fb9b3d9121
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple distinct hosts and UTM parameters in some URLs indicates an attempt at SEO manipulation or a broad phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 http://jfhcoaching.nl/userfiles/files/tutobejudufezuvibiwomo.pdf In PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/ki5tksvut9m840q30s7dqp4l4l/10829044017.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db7ef0bab8---mizekawamofaxez.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/ba39b045818153658b82da9b1f627e81/85712128747.pdfIn PDF document text
    • http://rurisnet.org/images/file/rinox.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios//files/devuxup.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1df322ac81---47088634518.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/fubejotikowiwe.pdfIn PDF document text
    • https://bdblue.com/ckfinder/userfiles/files/43424684541.pdfIn PDF document text
    • http://solarwindependence.com/ckfinder/userfiles/files/nivojubeluzo.pdfIn PDF document text
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/115c0ce4f1b674241ec8d31c15254acf/41935473017.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/loluxuxenuw.pdfIn PDF document text
    • https://dammesliepas.lv/ckfinder/userfiles/files/87401742311.pdfIn PDF document text
    • http://www.travelwithtaangoo.com/img/file/kisokuxobeju.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/vemobibikumujolomur.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/45452724111.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/5rriiigebihvdnuurnl36tqg86/36052570030.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/fazilusezi.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b4732545819---tabag.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/25561a5cb3dd8d7aa0af99ae474668cd/bokixamakizotuji.pdfIn PDF document text
    • http://fteq.ru/files/file/1679770868.pdfIn PDF document text
    • http://artiguardia.pl/userfiles/file/gilogonijifunuzofogujo.pdfIn PDF document text
    • http://songpinhao.com/userfiles/files/wujeleraxufa.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/kimevizodumifusunu.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16075fc71e1d2d---dulem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=laporan+fermentasi+alkohol+pdfPDF 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_off00012539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12539 10812 bytes
SHA-256: cc4abe42297546638a1938d99940231ed3f217e8ab5fe108bc054bff65ff3630
font_01_sfnt_off00013ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000155ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155FF 18280 bytes
SHA-256: f4e9f97da8dfe6495584c44621c2862c4c35361d77eedfe3de4ee346c472316d

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