Malicious PDF — malware analysis report

Static analysis result for SHA-256 e63328c2fbbbb7b5…

MALICIOUS

PDF

74.2 KB Created: 2021-07-09 00:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a8224d1c78547308acb8c589fb0439b1 SHA-1: 98a823ee1d9ba262dbda4e4bd7bd06f7411cab08 SHA-256: e63328c2fbbbb7b5eddf3c4032d35db541df6dfce148dea7c63379823cc61b9e
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://location-venise.com/italie_documents/files/gimorifuj.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bab764c0c38---xerajazimejabez.pdf
    • https://miet.hu/kepek/44022790791.pdf
    • http://somersetcountybar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wofegikoxunizezuwirala.pdf
    • https://bompentax.com/quangbasanpham/app/webroot/upload/image/files/26756566952.pdf
    • http://plncse.hu/php_data/file/53175344868.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a724f918946---17469239676.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd4d745a36---matutigikuxuza.pdf
    • http://au-zlato.sk/upload/files/68420313531.pdf
    • http://citra.cl/userfiles/file/pazaligujinoxoxejofujo.pdf
    • http://ibiforstarlight.org/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/98010133759.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d6b381d40---lumisog.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16084edd1d50b7---1953138827.pdf
    • http://deurenhanger.nl/userfiles/file/pokupiziterenusupumato.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b7896eedb---68481383744.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/7b326929ae2a42510b9b3a77d576620e/bopijil.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c1280edcc82---rimemiwibesid.pdf
    • http://concilianavarra.com/userfiles/files/49475119663.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/f1f856faa9efd1870fe6fd77fc01945a/18194023151.pdf
    • http://livingkaneohe.com/userimages/topisitawelowozewuxawege.pdf
    • http://nacyc.jp/Upload/file/48570714863.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0eb947532a---33180873443.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2cd5f2fb09---wedekoromipikutusu.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/47780f4053052d601c17131308c9573d/jogozibesijupim.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe6ae96480---sejudisojidukodided.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/pdsomar1q4jblkgo2p3ou1b9ml/8179751068.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=permutations+of+multisets
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bff4.bin
e06585671ccbbf42b85e281730b5725ab630d218fc218bebad1a070666216abd
pdf-font-stream PDF embedded font (sfnt) at offset 0xBFF4 10476 bytes
font_01_sfnt_off0000d7c1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C1 16792 bytes
font_02_sfnt_off0000efd3.bin
a2aecfe7b93a300575076a86650007ce127500a80dd9b596f0813fc54dadebe1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD3 16788 bytes