Malicious PDF — malware analysis report

Static analysis result for SHA-256 b58d63ede7344b11…

MALICIOUS

PDF

83.2 KB Created: 2021-09-07 14:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a099db65e6f89cd95648c4b813406be0 SHA-1: 545d178bbe3e0c690fd93f175ae06f0f96aee1e1 SHA-256: b58d63ede7344b112601d1df64e2cbb299df6f63284abe2ee83a21c93dde7143
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or SEO spamming operation. The PDF structure and embedded links indicate an attempt to redirect users to potentially malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d25b35aab1f---lodizujorovugira.pdf In PDF document text
    • http://ort168.com/upload//ckeditor/files/35294434000.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c8798badac2---supeleraza.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/37ce02f7561cb5a6419ef2f9eef61f89/60682004056.pdfIn PDF document text
    • https://wmu24.ru/media/file/vuzulukezibusuzetade.pdfIn PDF document text
    • http://we2meeting.com/ckfinder/userfiles/publics/files/malodulepaxetaxobis.pdfIn PDF document text
    • http://cathyknightwaite.com/ckfinder/userfiles/files/rizinekonux.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/37392974233.pdfIn PDF document text
    • http://mediaworld.pro/ckfinder/userfiles/files/mofikuvewalawisum.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb7020c061---91922945189.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/618e018dd66f0870b2b851e0d065f49d/rusimifagipi.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/gosajijewitetajazeg.pdfIn PDF document text
    • https://anfauglir.com/images/file/welopugoxulufu.pdfIn PDF document text
    • http://shinhwajudan.com/userData/board/file/1675193115.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/70935199393.pdfIn PDF document text
    • https://ymvii.com/admin/upload/files/52635911588.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/loluzazizij.pdfIn PDF document text
    • http://runhouchem.com/upload/files/77261393755.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609964e1c93cc---xamumopusifos.pdfIn PDF document text
    • http://bdsductri.com/upload/files/mexusebizogutibeteke.pdfIn PDF document text
    • http://hfengly.dk/skoleportalen/userfiles/file/xesaw.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078453de5020---minilogodalikop.pdfIn PDF document text
    • https://www.aifimm.it/admin/inc/ckfinder/userfiles/files/junuwerotatukifuloxalem.pdfIn PDF document text
    • http://ridendo.cz/files/file/vudozovunet.pdfIn PDF document text
    • http://architettipassarinmarzotto.com/userfiles/files/sizagisojopumipinajuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=subaru+forester+2018+manual+transmission+for+salePDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE009 16952 bytes
SHA-256: 6ad005a0df9d17bbb55f5f309aa2f3cbd5c7f52b2fd5332bbf08e33421cd2115
font_01_sfnt_off00010c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12417 11192 bytes
SHA-256: 49fd02d2cbf00f5eb9e7c2080973b8f5a5a2af64f78ba59c6011c6afd50e0ad5

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