Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1489971eb5efcf7…

MALICIOUS

PDF

88.7 KB Created: 2021-06-29 12:11:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 57ffd9c4b497124b1befbf9d8b6dfe29 SHA-1: d134336d1f4f026a8b57ce101242c86aa402d541 SHA-256: a1489971eb5efcf7e45f7c9040232067bd4feab36d9d9102461cdab26ce09bd2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document exhibits characteristics of a phishing lure, specifically using a 'Browser extension / update installation lure' heuristic. It contains numerous links to external PDF files hosted on various domains, many of which appear to be compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://drafthe.ru/uplcv?utm_term=premarket+winners+and+losers PDF link annotation
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607abe9f26c57---47936713440.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/gidosironudunonugevel.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3cd5810634---lowixarasalodapoveruwufo.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/tipev.pdfIn PDF document text
    • http://drive4smilesontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/26849251040.pdfIn PDF document text
    • https://osakadentalcare.com/contents//files/timapupip.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210502155505_599254084.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/2dbf6d188dcf85c380922fe0475f65d9/78238912824.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210520021505.pdfIn PDF document text
    • https://www.anandtirth.com/wp-content/plugins/super-forms/uploads/php/files/ckpgbcocm7dctfecil0n9h6s44/visasajovolexebut.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1606f919a6171e---63759707805.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/64625827555.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/56230148296.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a837cb943a1---gunimasalotofe.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8c4b8e5b3---6306940802.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/tegonafad.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c96e723494e---woronipimaletipute.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160942313bd23d---44057189053.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/95a6102654cb04f5131ee1ab5d3941ad/98244745895.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/gorowogubinojarenuwuko.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/90289143443.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0bf18c989---togosopijiti.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/kibubasewepipapunopoko.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c97e0313f16---turogodiwumotosarax.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/f507b202aac110a27cbfeec40be45c2f/77695037392.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/nivigaja.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a350e9a35d7---rexurodotaf.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_off0000f277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF277 18580 bytes
SHA-256: 2088202cecc598592c3d3c9aeb5dc3e0ef2d123d78e5faeb4b17bd9a8bf99fc5
font_01_sfnt_off0001235b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1235B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B72 10588 bytes
SHA-256: dbb2677eb735d5ea001eff0721967e8868dd48770b0c258e6bff560ef8405381

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