Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a326b414a77d074…

MALICIOUS

PDF

71.3 KB Created: 2021-09-17 11:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6fb31999a649b29390445784440efddb SHA-1: bc7df37a68f4ba7b9b15a9ce62d66549a42f6fd1 SHA-256: 2a326b414a77d074177ab74d62b392b5c8c5254aa29845d8a93a0ebc8e470035
144 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, some of which point to compromised CMS upload storage. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content is designed to trick the user into installing a browser extension or update. This suggests the primary goal is to facilitate further malicious activity, likely through the execution of downloaded payloads or by compromising the user's browser.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • 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 https://chcial.ru/uplcv?utm_term=cast+to+tv+but+keep+audio+on+phone PDF link annotation
    • http://thuonghieutoancau.vn/uploads/files/88242868291.pdfIn PDF document text
    • http://girisimcilikproje.com/resimler/files/8764916997.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/jeposefovudu.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/rufrvfoh3kaddj9169mdfi1oo7/getoxinegimowupirepazun.pdfIn PDF document text
    • http://autostyle-japan.com/js/upload/files/sifutudunugebuvi.pdfIn PDF document text
    • http://metalltechnik-kutschi.at/noxibubabevogebe.pdfIn PDF document text
    • http://yuhenganquan.com/userfiles/file/20210917160710_63371004.pdfIn PDF document text
    • http://insei.eu/userfiles/files/lonuz.pdfIn PDF document text
    • http://rebeccafantarchitetto.it/userfiles/files/wudivojovaj.pdfIn PDF document text
    • http://ortopediaszombathely.hu/editor_up/vujaji.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16137d91f086c7---17557659677.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/66591297463.pdfIn PDF document text
    • http://culfordequestriancentre.org/UserFiles/file/35668574256.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/19317342589.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.org/upload/files/79371190463.pdfIn PDF document text
    • https://produktybhp.pl/pliki_user/File/51014307699.pdfIn PDF document text
    • http://cloverdiamond.com/file/barezudidubenupuxovapo.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cbe2b61572---35128196066.pdfIn PDF document text
    • http://kleinschaden-expert.de/userfiles/file/jevekovumilaneb.pdfIn PDF document text
    • https://hv2barrier.com/application/third_party/ckfinder/userfiles/files/32764357151.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/ruzawabixelavijuze.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/19147563698.pdfIn PDF document text
    • https://harshahometutors.com/uniformkontakt/userfiles/image/files/99102187455.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_off0000b6a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6A5 15872 bytes
SHA-256: e49871496897cb166b94d8eaea4338e0d5ce5c5373357550bbb2549f51252d23
font_01_sfnt_off0000df38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF38 10772 bytes
SHA-256: ff6e3910bcb205cb3db4a8853bb5399c915d13c92f71195bbd8093379369b088
font_02_sfnt_off0000f7c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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