Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a629ebe30ced7b0…

MALICIOUS

PDF

66.4 KB Created: 2021-09-28 03:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 26709defbc229ace62e47d42ccd61022 SHA-1: 2730763bdd74c1ea94a9a6f97ec225ef5b0a70dd SHA-256: 0a629ebe30ced7b06030762b4582c1e5753af9a3e9a07ef0dfe12ab98ce6b40f
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm to distribute further malicious content or phish users. The presence of these links and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134064346acf---jamipavazozekobonisu.pdf In PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/durarodebojujokogifawuz.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/lenotumerebapavubo.pdfIn PDF document text
    • https://limsurdua.com/contents/files/xufuwapubusinarumaj.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/2609da0dd31fbfaa0cadc95abb9c5496/82388676699.pdfIn PDF document text
    • http://kaiyudachem.com/filespath/files/20210917164553.pdfIn PDF document text
    • http://bio86.fr/userfiles/fichiers/jenoxezemajalaxoname.pdfIn PDF document text
    • http://take114.kr/FileData/ckfinder/files/20210924_A5D2BCDDDC8DFE91.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1615241d321a18---muxizeradoxudafatadonoxos.pdfIn PDF document text
    • https://12shio4.com/contents/files/wubopuvoxe.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/161386649337a9---xujetobamexatajojopimi.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/84384581139.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/ninuwetobonimowizini.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140cd8a52287---51867054859.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=super+vpn+for+androidPDF 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_off0000a614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA614 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000be26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE26 15432 bytes
SHA-256: f152b7302583eb8696d00e00c788b7231d29cc4fcde76206c8947eb32630ed7b
font_02_sfnt_off0000e586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE586 10420 bytes
SHA-256: 40a66bbb7ec9f50c1cbe9e53ba16a9c2e897c9bd80658f5b817146ce8c94cedf

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