Malicious PDF — malware analysis report

Static analysis result for SHA-256 5801550535643f4d…

MALICIOUS

PDF

68.6 KB Created: 2021-09-29 04:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9eb4848ca222b75bcb6cd49e9aaf000c SHA-1: c5ad447288d7cfc27d61768fb30de466863fb269 SHA-256: 5801550535643f4df0cfadf25d025c03f89ca3980f8c5558c6edeae00dab5eac
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. It also features a link farm pointing to multiple external URLs, including one using an IP address literal, suggesting an attempt to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://bipalisdemo.dashindonesia.com/userfiles/files/71514845622.pdf In PDF document text
    • http://le-nora.com/userfiles/file/kojivuxifozeweka.pdfIn PDF document text
    • https://ecohort.com/userfiles/files/sowekotuxowipavodugakarap.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161468972acfce---17563401349.pdfIn PDF document text
    • https://uzsienis.cvzona.lt/resources/img/files/donovux.pdfIn PDF document text
    • http://garageanything.com/js/upload/files/sigipatufibavotizudaneki.pdfIn PDF document text
    • http://neonatal-surgery.ru/userfiles/files/28467195774.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148b31d62977---4443709378.pdfIn PDF document text
    • http://gz-chengeng.com/uploadfile/files/fujotu.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/52552963881.pdfIn PDF document text
    • http://web5gstore.com/Files/files/27309797361.pdfIn PDF document text
    • http://signauction.net/userfiles/file/rojirarujomapoj.pdfIn PDF document text
    • http://studiobardinisrl.com/userfiles/files/43270013963.pdfIn PDF document text
    • https://ozanetiket.com/TasarimAcarnet/serhali/upload/files/39298383802.pdfIn PDF document text
    • https://ovistar-dz.com/ckfinder/userfiles/files/pidakudebedomupemabe.pdfIn PDF document text
    • https://fcimoveis.com/imgs/file/44242655156.pdfIn PDF document text
    • http://theblare.com/image/upload/file/84191142123.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153b2c529996---77657106756.pdfPDF link annotation
    • http://drcleancenter.com/uploads/files/202109290934009716.pdfIn PDF document text
    • http://besttailor.info/ckfinder/userfiles/files/9514319996.pdfIn PDF document text
    • http://tuderprogettazione.it/userfiles/files/97531112689.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615383c90e3b9---bilumaselizesirew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=pdf+merge+apkPDF 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_off0000b0dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0DC 14792 bytes
SHA-256: 803fd9876049b1ec30994b42b0dfcc0dd7cd9ecb43c73a680146e9f73a24e5ee
font_01_sfnt_off0000d619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD619 10308 bytes
SHA-256: a38ba97417c703e468a9c0e0475d7a42c25185d4cc584316719167f76fd5b7a7
font_02_sfnt_off0000ed1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1