Malicious PDF — malware analysis report

Static analysis result for SHA-256 8233d1ffa55d4c0e…

MALICIOUS

PDF

88.0 KB Created: 2021-09-01 23:27:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 78f899e66c176997541a90aeadbbbc93 SHA-1: 93b0eff87e462b555aaba752340a7291e7828ded SHA-256: 8233d1ffa55d4c0ec6dd357d931859affdc4b695b6d2b44172251184814e5478
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=how+to+get+a+custom+cape+in+minecraft+java PDF link annotation
    • http://doorsatyrau.com/ckfinder/userfiles/files/64153195896.pdfIn PDF document text
    • http://eshop-kocicinadeje.cz/files/file/fusil.pdfIn PDF document text
    • http://xinxinhouseware.com/uploadfile/files/71658134467.pdfIn PDF document text
    • http://kripasec.com/userfiles/file/51186863614.pdfIn PDF document text
    • http://sbox-technology.com/upload/datoteke/48252196131.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/cd41qlfudg3f0tnubasqnr6r52/8234908500.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/bivedubowadifom.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/i8cfbppmd10oggnk3c8ta9l512/38756564689.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ded3cb2f077---wonaredibepigikezakez.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/nopirebipa.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f139261dd34---45683598857.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/lokobaso.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/40790739865.pdfIn PDF document text
    • http://alexhoffordphotography.com/temp/files/file/18783625940.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/j1orjl3stvmu9st391nd0dic9j/19052553369.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/j5pah5j7hq7nc81m5llm67tdq5/takunetakodedumiweni.pdfIn PDF document text
    • http://hz-kontejnery.cz/ckfinder/userfiles/files/jixizekosejelukumuxar.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088d7055b4a3---zibub.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/ea3e847c14a0d160276d461ce4e59079/71990997908.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/61869cf79d990a2f1b4d3c843b0a4404/40854134860.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/1a80c2a57641b44b6488374d73788464/80581337543.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d919af596e8---57612531185.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/tosojon.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b99ca7347f6---zisefotom.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/99j1of179t9q0671o0igkicgi2/30828092522.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7B 11152 bytes
SHA-256: abf3c8f85661fde70fa079b54183a7826e60bf14c862639c3224459b1dbe5b49
font_01_sfnt_off00010688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10688 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9A 19220 bytes
SHA-256: 64e21bf46dce97f99c713cf5c966c5cfee4ad053aeedb5cfd848170732b06590

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