Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60fd03edbfb56e5…

MALICIOUS

PDF

80.4 KB Created: 2021-09-10 07:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 94940c064b3ed8b90f8fad06c93b47f6 SHA-1: fa2979701804804f37e6c5998b41742bde09841e SHA-256: a60fd03edbfb56e5ab643493626f9395f7c2dc1d0c4ce55609d0d9591d1184de
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to multiple disposable domains, indicating an attempt to deliver a malicious payload. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of multiple unknown URLs strongly suggest a phishing or malware distribution campaign. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 9

  • 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://huntic.ru/uplcv?utm_term=horn+game+apk PDF link annotation
    • http://446888.top/userfiles/file/70869427520.pdfIn PDF document text
    • http://pieseclimaauto.com/files/file/20460869734.pdfIn PDF document text
    • http://rambud.pl/uploaded/file/45270163679.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/161313f7e565a4---29467156270.pdfIn PDF document text
    • https://lacgl.org/upload/editor/file/riwepomegegapanasubizofa.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/01ae64919997b63423ef6c58dea54169/93053648390.pdfIn PDF document text
    • http://gndpta.eu/news_objects/files/gikasujaguwuguvage.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/27061332945.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/14371427419.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/beturuxowekik.pdfIn PDF document text
    • https://prospr.fr/ckfinder/userfiles/files/tifemikuzamipe.pdfIn PDF document text
    • http://naszymsladem.pl/upload/file/jaderirufezotexukuwid.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/panub.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/90427095055.pdfIn PDF document text
    • https://mantyobras.com/userfiles/file/pimupiguj.pdfIn PDF document text
    • http://hoangnamjsc.com/upload/files/76580671389.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6285cf922---78942355897.pdfIn PDF document text
    • http://myatkinsonfamily.com/userimages/34662973327.pdfIn PDF document text
    • https://imahima.xyz/js/ckfinder/userfiles/files/masowafiduxakenufo.pdfIn PDF document text
    • https://luatsuavina.com/userfiles/file/28269796730.pdfIn PDF document text
    • http://studioboscono.it/userfiles/files/lataweramapafemagevubeguj.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130982b2b272---36367102093.pdfIn PDF document text
    • http://kriosispl.com/cote_dor_import/admin/ckfinder/userfiles/files/68421538390.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_off0000d6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B2 18192 bytes
SHA-256: 43dfd1bf418819a9123aa5bbfaa4d5c1161a32ebb4617f0b2c57d4cf2f44b1be
font_01_sfnt_off0001054a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D61 10276 bytes
SHA-256: 33060298001b0399e77d7223409402f32418abc36a295dab19c6e93da2508a9f

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