Malicious PDF — malware analysis report

Static analysis result for SHA-256 df9ae8812a38693f…

MALICIOUS

PDF

106.3 KB Created: 2021-08-14 06:14:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 5526cf25ebebb2dddbdc45d29c11d3ce SHA-1: 6efdf34d8ffa390ea86cfca58f025f0e6dac2a8c SHA-256: df9ae8812a38693f2dfef3e69696e80d83c7e43874124e7492ceaab2a69bc29a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple external URLs, some of which are hosted on potentially compromised CMS uploads, suggesting an attempt to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • 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.
  • 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://bursajp.com/contents//files/zifasana.pdf In PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e75b96e39---26507594481.pdfIn PDF document text
    • https://galedo.cz/www/data/cms_files/files/zotuje.pdfIn PDF document text
    • https://iwistw.com/upload/files/91250246085.pdfIn PDF document text
    • http://cuahuyhoang.com/media/ftp/file/mimixalopi.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/t7qa1qm11eikb6ums5dfqh0b9t/39266610592.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/67136408635.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1610708258ef42---bupajunafok.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/fuvetinowosu.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/26467283657.pdfIn PDF document text
    • http://mytmbc.org/fckimage/file/kivudupapape.pdfIn PDF document text
    • http://ilyxrace.com/userfiles/files/jomadi.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/e24d174a60c6625df1f007e749ce7651/44301036145.pdfIn PDF document text
    • http://museeducuir.org/upload/files/tixurejesujudi.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbc394a439a---fogixekelexoseletuzoz.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/41584242041.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611359091be72---vazenuninaxikek.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/608a4d6321773bed4dc67a71245c6b58/49507048350.pdfIn PDF document text
    • https://essaidafm.com/uploads/FCK_files/file/sefimobulokoxizowusolejog.pdfIn PDF document text
    • http://minipit.com/data/files/newusawalasarojizovux.pdfIn PDF document text
    • https://art-eria.pl/mandarynka/pliki/files/wepatoxapi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=igcse+chemistry+notes+pdf+2020PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117FB 21636 bytes
SHA-256: 4caca430039649ad5a15fb167d0254afb4140d8fa580444e4880c5feb538b1e9
font_01_sfnt_off0001520f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1520F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A26 11168 bytes
SHA-256: 66e289e4f284fc7580569071e7c533616c8bf1f3223a566e2b8a002207055051
font_03_sfnt_off000183e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x183E6 16332 bytes
SHA-256: d9d37dabc6af646f71370d6462dcf0e51d8110c84ea55ed14048dfa11ec17180

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