Malicious PDF — malware analysis report

Static analysis result for SHA-256 980b0a456fc8a70d…

MALICIOUS

PDF

68.7 KB Created: 2021-09-25 02:12:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 27cda0cbdcdfaea08c29b2001607eb0d SHA-1: 3aea8a88f3ea6141906b590d36bc6b45785d986b SHA-256: 980b0a456fc8a70d1b7245cbb40db16214c836ea83df85e5376cf657db2a9246
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites. The heuristics indicate a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to distribute malware or conduct phishing. ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 8

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://kapsalonvogue.nl/files/file/fajejojevasid.pdf In PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/sipepubi.pdfIn PDF document text
    • https://ceccarmaramures.ro/userfiles/file/14537312996.pdfIn PDF document text
    • http://kodemari.info/data/files/tenuwotibesof.pdfIn PDF document text
    • https://keluargamimpi.com/contents/files/34105435252.pdfIn PDF document text
    • http://xn--2e0b95unoa536adofm5h.com/userfiles/file/23355047220.pdfIn PDF document text
    • https://adikmanis.com/contents/files/jujuvuja.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/0197ae49960980080bb0584f7558f0a4/kixusubosetina.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/janomazipo.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16142c8fe05c08---bitofekanugija.pdfIn PDF document text
    • http://longarmquiltingacadamy.com/fckeditor/userfiles/file/bilijipulibimudasu.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/78847250506.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/vitufodot.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161432fe235eee---foxixodibidiz.pdfIn PDF document text
    • http://kimsanghun.com/upload/userfiles/file/2021918159138251.pdfIn PDF document text
    • https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/58515816138.pdfIn PDF document text
    • https://cosmeticdermatologymiamibeach.com/uploads/data/files/15035036029.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/88099374190.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/25859764653.pdfIn PDF document text
    • http://wu-pao.com/upfiles/editor/files/98936735331.pdfIn PDF document text
    • http://struttur-arch.it/userfiles/files/95209219241.pdfIn PDF document text
    • https://stehovani-ostrava.cz/static_pages_files/file/wirew.pdfIn PDF document text
    • http://saringkarnwood.com/UserFiles/file/gutov.pdfIn PDF document text
    • https://mitrasuksesku.com/userfiles/file/fuxugegep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=top+10+hot+fortnite+skinsPDF 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_off0000af05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF05 14896 bytes
SHA-256: 71e723779677e6fbd878a6def01347fec1f6db55bc1d2a4bc09a65b2e10f0b76
font_01_sfnt_off0000d3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0A 10476 bytes
SHA-256: 2a709fe69b18905a888a081033967d7a05552b51a8cba47ed841df714a8ef144

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