Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ac4ee3dd500e650…

MALICIOUS

PDF

83.9 KB Created: 2021-09-04 23:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d12f5feaa46324cc4746c8fb23ffa435 SHA-1: 0f91ba8164fec16fd57dbf2b10abdf9590dbb2f7 SHA-256: 7ac4ee3dd500e6509eacc1283ec672208a00050817919b23392f3392964cf060
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to lead users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple external URI heuristics further supports the link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/8feb025e6f926e3579b3574cffed9f7c/90510213400.pdf In PDF document text
    • http://singer-island-condos.com/userfiles/files/wibiteterakuvobutik.pdfIn PDF document text
    • http://cungcapluonech.com/upload/files/fifelifirosuxiv.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/numaga.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160c7c0cfecdbc---zosib.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/ififutefonoboxos.pdfIn PDF document text
    • http://hulstcustoms.ru/uploads/files/73309878141.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/26876877863.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16071796a173ab---purebo.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/jolaj.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/a17c45a688001af55e0a9b5fff2ef6e3/fexerukivoka.pdfIn PDF document text
    • http://jaatkinson.com/userimages/gubidudisu.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a377812e5ca---37724015021.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/lawomumobamupurofire.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/70881379240.pdfIn PDF document text
    • http://geoscan.it/userfiles/files/rixabexuremorusunevi.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/5ua10rhi1miou4vj8hvb51aut2/sofosazifozodudixofujev.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160944281e5fe3---57133880984.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/46035731544.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/tokeb.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e9210c9e6---laloponevubafanes.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/4e13da3342a8decaad363b2074ab42e6/65120613820.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=spreadsheet+modeling+and+decision+analysis+6th+edition+solutions+pdfPDF 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

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_off0000dcfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFB 11524 bytes
SHA-256: 0cfdb47725ce1d08d5a19f96d827fc554551a73250c3c7ad6afd7c6ad9aaec11
font_01_sfnt_off0000f7de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DE 18612 bytes
SHA-256: c1257e1ff2feb60509f7f19ece945b55c5cb1d4755fb930dba0b2ac60c75118b
font_02_sfnt_off000128fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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