Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ca17838bbe61fb5…

MALICIOUS

PDF

96.2 KB Created: 2021-06-28 19:43:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: d63255a760bfe2e8d6b00eda03bd3fe7 SHA-1: e52e16ac50258e6b05ca8d31eb9833630d0ac90d SHA-256: 1ca17838bbe61fb5a2ba4203961af703c028c821f172cb94505a6c48765591d0
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to other PDF files hosted on compromised WordPress sites, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure itself is the attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://aronabritcan.com/userfiles/file/remonipilimaxagolu.pdf In PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/3j65gpnaid1sivgp6lm18oa3e3/fizavodop.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/fillhuj44tdmsn1fv84d4rs7n6/41401603667.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/rfs4bnqmssrvsocr7tiopnt344/13208356184.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/zipimeresivunifebiwatuwil.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/82332050123.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba38001157d---rogusizaxatedo.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/d01b44feaf5940fac9261be9e2681ff1/99220283133.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d98aa11e6---gisonepijorupoxex.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/b3c40f3a58895d5a136a1bdf53456a4d/tutiwezivurabamimaze.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160762a58e25df---suwunurafafavulajo.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ca5340136a4---7502567682.pdfIn PDF document text
    • http://nusratali.com/userfiles/files/16173218245.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160901f808376d---fitov.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/fa18bbadafbe9743bd6af99250014ce5/xerokinepezugisoko.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/87711e0660d73a9b31e41cc0451dd69e/kelalitopebaberozerexi.pdfIn PDF document text
    • http://lbtech.kr/upfile/files/89276270657.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/wakafigi.pdfIn PDF document text
    • http://brooklinehs1964.com/clients/6/6a/6a3559cec3eb17f551da2d864c8c85ab/File/figino.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bea9245824---lafomuberebufibuximij.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e141b01c6---33624620861.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/pogunataxakok.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/vitibisiwuwiwofu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+make+a+vignette+writingPDF 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_off00011424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11424 18624 bytes
SHA-256: f430b062fb987867c2c17f966c12ecee2ddc85daaea955651cb14deb1e6869e9
font_01_sfnt_off000144a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015cb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CB9 10472 bytes
SHA-256: f6cc4b0d4520b213522eb76fab8bcb645f61b823b753a4ed2a6f006ab0dbe960

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