Malicious PDF — malware analysis report

Static analysis result for SHA-256 adc2caf3c5355c0e…

MALICIOUS

PDF

90.3 KB Created: 2021-08-19 20:02:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a9fbb0bbe161d5f855da903429b99109 SHA-1: 0d544536a872a26affc77fc48eabe3cff19c0358 SHA-256: adc2caf3c5355c0e7fb1ed05a19bd5487775b3f7004ed2fc7eaa448522d0981a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various domains, several of which are hosted on compromised WordPress sites. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://medvor.ru/uplcv?utm_term=israel+in+the+wilderness+scripture PDF link annotation
    • http://arnold-sitter.com/CKEdit/upload/files/womazefekivuwobamowuz.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/b91611096cdd3e24ea1d8eb70082b48a/mizevawonenibibimofekuv.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608460c5caa90---36418116834.pdfIn PDF document text
    • http://futuralagoparking.eu/userfiles/files/betazesiwamozoxakurimolem.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160cab220115da---sadoledugukav.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/aa2d11696b048f979c9cef0f6905e982/lofebapijamib.pdfIn PDF document text
    • https://xnkvinatimex.com/uploads/files/47551300873.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b46dae7d88d---bamaza.pdfIn PDF document text
    • http://dashoernerboot.de/userfiles/depowenejawebovapepefej.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070db019d4bd---lobugudinuvosizur.pdfIn PDF document text
    • http://trevelci.ru/ckfinder/userfiles/files/3416046423.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16090771dedb40---35193562120.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/pavimoziz.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/fasodowawe.pdfIn PDF document text
    • http://irishheritagesociety.net/clients/7/7f/7f3653e4c5d791bf76f28d2bf9929747/File/ranibiwozena.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/36690912123.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/62932416159.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160a52295e41f7---85030896238.pdfIn PDF document text
    • http://canvangdientu.com/images/file/93038589198.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/bizaxoveruxipelegijake.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095794b8bf34---12500989400.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/fixapafevavoteraxer.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/4dc2b9d832dd0f5e63602104b8e290c9/6614504001.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/ta4fknrl9ptpc3q3accb4hkt2j/xovefozabubomumusabawuj.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEE 10628 bytes
SHA-256: 8884f1585b95c152f8040f208c82399298daf2a94a3f4c9155db5c14f939e90e
font_02_sfnt_off0001182e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182E 16600 bytes
SHA-256: 36bf309627e03b88ffee758fecb7a959e1d40d595c8965a3ba4775ce5417d744
font_03_sfnt_off00012f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F8D 16608 bytes
SHA-256: 5808b96cf0a87e099cde35aa3c65615f352bb2713eb4abe0f4837a0d39ecb11c

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