Malicious PDF — malware analysis report

Static analysis result for SHA-256 92d0755ef2cf5639…

MALICIOUS

PDF

98.6 KB Created: 2021-07-07 18:42:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 05d8e68fed6c47e2d55df947f635cdff SHA-1: 11e2bef9d8a4a4ccaaf4185ed9cb58bfcc03fc5c SHA-256: 92d0755ef2cf5639567e48f96dbb96540a239836425f013fcde57e7685f8bf9b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with many URLs pointing to potentially compromised WordPress upload directories. While no scripts were explicitly extracted, the nature of the PDF and its embedded links suggest it is designed to lure users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://thinhhoanggia.vn/Images_upload/files/rimuwubu.pdf In PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ede60c646f---kawizew.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1608d564381f70---nedazevamadosukedozixexar.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4a69792587---82760925669.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c65c2bc750---lapapomevi.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/dfb0644575334b205f206108138a0252/xizuja.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160756d3596f8b---25254621914.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/68305318515.pdfIn PDF document text
    • http://fairway.cc/images/blog//file/57621528924.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/19racul7eg484qid0vorjc5o4m/potadajegoxofo.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210429065638139.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083263e1d363---biwebisizovezafom.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/64721755211.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/033fa6995762380ce734cd6aeee32357/1069337991.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160be7ad62589f---54777703492.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021061007361371.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609df0b1864d7---diwuv.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/53773994308.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/suloxabilebipokoviporaliz.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/9e7b66ac3fd80848bf416ec428717c66/gokigena.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/40437540113.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/kuwov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=architectural+questions+and+answersPDF 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_off00011d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001359b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1359B 18044 bytes
SHA-256: 71aa26ef22e38589cca6b7ee8806e7089d491f270ac9cdd569688f9cc1d5949f
font_02_sfnt_off00016473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16473 10780 bytes
SHA-256: 0f486e4d84a6ca82cefd1a40224e48bbf2a04f6998540f5a311f32601a3a0b73

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