Malicious PDF — malware analysis report

Static analysis result for SHA-256 b09956834180571b…

MALICIOUS

PDF

84.9 KB Created: 2021-07-02 14:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 87211c4dd665155b08b160480f5f0bd6 SHA-1: 0ac9c34d76e96db02c3771f8032a71b71318c18a SHA-256: b09956834180571b8fcf9928f3be9687b0aee4204704d0092652b42472908613
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites, which in turn host additional PDF files. These secondary PDFs are likely designed to lure users into downloading further malicious content or providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://obrienbuilders.com/userfiles/file/47630959567.pdf In PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944c251b40e---mesedekivivale.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/b809e4ae8287c86959d3f87436317ca3/pokikesorewetalupazu.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/ejbkk4vcnegnmm4j9gnaijmeoo/60548861350.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081138c16acb---36937532381.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c43eb2bd5e---63327065902.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833ccfc9ec7---53493018302.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/76100d29409892f6e59e6b438c7a514e/xaguwipedilosedenemekaf.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/21b0cb6cbb4826c727cf7cdc810c734d/xonorukakimutusobafos.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/a2e8f7304817d6008e465abc15720f47/42949404596.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16079ab007f836---nalafabazevaxo.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/htr2mjsro71oonjckdqri4i2v0/lofidivasivemiropuru.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/xazurogolu.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/ffff0b9fe7e0635cc8210759a002d8f7/fidewimufikaze.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/51610905643.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/40089895710.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce005c078c---ganexunep.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/23826562330.pdfIn PDF document text
    • https://carlojans.com/cms/file/kegonidiz.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8b1c1e1b2---votiruzepogitasuxo.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/24423082810.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/44110401719.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16078ef5ae0e2a---japeraxod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=one+punch+man+workoutPDF 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_off0000ec0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0F 16400 bytes
SHA-256: d3b45ca05ed76b1ef8b82139027dab9e787e4aa82c5a1be217d4388c6d108e63
font_01_sfnt_off0001165d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165D 10636 bytes
SHA-256: 10b478db87c5ac36eea10482448bd374c2d0494f2e240b6678f8d803411b6198
font_02_sfnt_off00012e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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