Malicious PDF — malware analysis report

Static analysis result for SHA-256 e41ea072ad36674b…

MALICIOUS

PDF

89.3 KB Created: 2021-06-26 14:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 532b84005fd0ca6533b9bb76cdad6940 SHA-1: 5428e664bd34b557d2c53ed30f351ac1fbaab596 SHA-256: e41ea072ad36674b4379ec2a8d400daf5d8ad16d7159e5ac38310c327abb31ce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The PDF's structure and embedded links are consistent with techniques used to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://inwebjor.ru/uplcv?utm_term=average+cost+of+appendectomy+with+insurance PDF link annotation
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607732b0a101c---32295146954.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608e33123e2d3---zativuzofewanubu.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1bcb885c90---11163818619.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/e8d5e24b0c4b8d7890202383f6c8f4b5/rejofawokesigadif.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/mowepuxonat.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/maxudusekewuvijuno.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/5f9f98d87b303a85f9cd30c11c1d57e2/2207101755.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949d928735f---setepesuvelo.pdfIn PDF document text
    • http://crocepadrekolbe.it/userfiles/files/wojuj.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/pabifefadagemel.pdfIn PDF document text
    • http://trhs64.com/clients/c/cf/cfad56e582d93fa9eda51f2516e23bdb/File/sutapofudafuzopobixigi.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/55799780159.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/30132852689.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/d81c4189d8990eaa2d485f276736d429/wozegugewu.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/gedijenunetigab.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/c7d3e652000d67aadcfbe206fe78628a/76195115137.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/eu0kpt3app6i201nb7tglit78j/81717814460.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ef941a47f---pakavebofaterinum.pdfIn PDF document text
    • http://matsusushionline.com/uploads/files/91157632720.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/06/files/210606020444.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a0189e87d---64446168436.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/fivipixesamadagu.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/a04a0760779fcd3a8c530a6ea5aa9d0e/zasawez.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b49615b2ad---kulisepafadefesule.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_off0000f772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF772 11368 bytes
SHA-256: 474147be99477684bb8f311886e089be08f7e435d917d8af49c512bc98af268e
font_01_sfnt_off000111f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F3 16900 bytes
SHA-256: 78063e67847d07525775b82192fbeb5fdcbf454cd6c8c738893d90898144e126
font_02_sfnt_off00013e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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