Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7380546272a0d3…

MALICIOUS

PDF

77.5 KB Created: 2021-09-01 12:36:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0ab81433b1437679082ae648d3e81a1d SHA-1: 8ea12ac2f8e35429b7cd83563d31398492846d1a SHA-256: 0e7380546272a0d3b3980cdf20a0c9331d473ab145496af81454378209417b55
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML classifiers and ClamAV, as malicious and likely phishing-related. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm designed to obscure the true destination. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious content, potentially for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://grandplaza.bg/uploads/assets/file/popaneruxujomuriger.pdf In PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/orijo7ijh8p6bt0m7dba3ma89q/nakofewuzininodenoni.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/rodazevefewuwusobebugasiv.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/fefamibuzopadofezidezufo.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a290f9048a7---xonapubedol.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/8tsnimmf9bo3s6dd70rum00b95/senigigupezusubojowupusaw.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/zuguzumovesigib.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/najisika.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5be95a28d---54423185182.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/takonumozup.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/ponisowomidovorowifivifo.pdfIn PDF document text
    • http://lctrading-gmbh.com/ckfinder/userfiles/files/62814463273.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a58db29f0d0---pefisego.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/16529675999.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/xokefagakitabudidijos.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/gfi7eu23v44ist7k95diumqrpp/84847932429.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160f6f7974f677---pezapagatidisegumugukuge.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/l9ioq0rufonbhb57bjv4k24hrd/71901330442.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160823cc6f2e89---donodawefadafe.pdfIn PDF document text
    • https://concertwristband.com/resimler/files/zulegukoz.pdfIn PDF document text
    • https://agatanorek.com/files/file/95779081109.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/85447253778.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608276250701f---21160973166.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/18396575146.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=love+knows+no+bounds+novel+pdf+free+downloadPDF 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_off0000cde5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE5 16084 bytes
SHA-256: aa173ffec04ed680f2da99360165157d4ae750c92e07215fed934f62059a491c
font_01_sfnt_off0000f73d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F54 10744 bytes
SHA-256: 4aa96005dab351ac56668a92e374ec723bd1755d5fdcabfab0b3f14dc6e8249a

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