Malicious PDF — malware analysis report

Static analysis result for SHA-256 0553bcd98320ab9e…

MALICIOUS

PDF

95.4 KB Created: 2021-07-08 00:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: dcca1a1ce9a2c8554688e1910a29bd2c SHA-1: 20f223523073bb8ada1fab41d72e246df2ade3a4 SHA-256: 0553bcd98320ab9e305b50bbe5a6a77f8cf9d6676e1fb355d45d256d8e088a07
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards the use of embedded JavaScript for malicious redirection.

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://pixomot.ru/uplcv?utm_term=appraisal+self+assessment+comments+examples PDF link annotation
    • http://josephfellerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/16115451587.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/titoselimoberunuteru.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/954a2180ebb232e7148f0cc5f6a30c3e/muzipuxoxel.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160baa24680181---97543703484.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160846eae31eb6---ratamusuxezovoxeburi.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa0693a135---51122422538.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0514f2765a---korusizororifux.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/f8ce325945df16077103d536fa0efd4c/kulimedaxagizi.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/11057698173.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/53737410788.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/f71bc4aac76e387d312ae64ee3edbc17/79930194405.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/ruzetakufemumazosukebul.pdfIn PDF document text
    • https://bodymart.in/ckfinder/userfiles/files/45934420823.pdfIn PDF document text
    • http://auksozvynas.lt/userfiles/file/54674887697.pdfIn PDF document text
    • https://whitesal.com/data/images/file/3197_20210621081143.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/c54ntbvqsfjrd9kqhu7dhkdqh6/21651242294.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/avl8s5uuq9afte8vrbhbav5o84/22485008997.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/iksr64s8n18t90vduvu6igf8id/62639590740.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/72e0360dd219c525ccede0b1227cf73c/87250259729.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c3091bbe7a4---xejus.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cf18e2699---lowijuzuzuses.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/e5dc1c77208e425da2fde7e003f959d9/17669251607.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/bdfb1431422d662e197a08395c84fba9/7803383297.pdfIn PDF document text
    • 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_off000111c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000129d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D5 17404 bytes
SHA-256: 1e83818a9ef7f716ed345d1bae6df276ceffe7083d0a9a7095daff5f1d4e0878
font_02_sfnt_off00015767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15767 10724 bytes
SHA-256: af6915f20529437b301a96e060ee98e241b5c2781db02e0000c4fe4931120634

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