Malicious PDF — malware analysis report

Static analysis result for SHA-256 d73e219abe1df309…

MALICIOUS

PDF

85.4 KB Created: 2021-07-07 22:02:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0e391a0b9a9b80d35d9fe648ea599eb8 SHA-1: 2f9cb92a44f917bbce9971a1cea6bb253bef77ca SHA-256: d73e219abe1df309fd4078a4615bcd2cf19851d6ac071b5bb2ab6ff5132ed393
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, a common technique for distributing malware or phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack pattern involves luring users to these external sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://seabeachthailand.com/UserFiles/file/nitavoganibep.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609864073f8a9---rojugemexevizenebeni.pdf
    • http://adabaskimerkezi.com/upload/file/pikumi.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/1a0c6ccba72c116c284df678b1b7223e/gulolidepinisoxe.pdf
    • http://lungshingcentre.com/userfiles/14246364312.pdf
    • http://webhenevents.com/clients/868374/File/6914028701.pdf
    • http://micronforgacsolo.hu/UserFiles/file/lalanivopodovowetiz.pdf
    • http://baloneacessorios.com/_upload/file///95133622157.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160856103eca24---94926134494.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/l5kmjpmvpifkfcotgt55hgqqc0/kogobamegemomoza.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/rab276j01jd6om8ps4pip91o8s/gigotipajidibivezipo.pdf
    • https://dejavuruse.com/userfiles/file/bimukezo.pdf
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/gelisowu.pdf
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/rafinemufofineroparu.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abafa613f16---22001191118.pdf
    • https://castilloexterior.org/ckfinder/userfiles/files/59709880037.pdf
    • http://abpaluso.com/upload/file/86049249167.pdf
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d81a9af46---45393829988.pdf
    • http://ghettaetamionarchitetti.it/userfiles/files/zogozajovuv.pdf
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/ffa2ddf8aa2983cbd0894f544b0f8107/86167008524.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/kckvbolpg676tri0j1ru2i2q9d/mopakopezigojalopuda.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/8cbd3f107431f2dccc0de893947e7622/42155429186.pdf
    • http://smartvoicecom.com/userfiles/17283189910.pdf
    • http://ahkjt.com/upfile/file/lutuwa.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607046c80ee46---nexisobotigogufitikusoti.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=formula+questions+and+answers
    • 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_off0000eaf7.bin
b30b0c6063526b5ad63c9451370482fe0410b4b93e2492f4b6ac33e2bec4f2b6
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF7 17084 bytes
font_01_sfnt_off000117b5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x117B5 16792 bytes
font_02_sfnt_off00012fcc.bin
1fcfb8205ac9d14f36be0a75f1e229c92b105efb04718143f9eaf06ef99de281
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCC 10716 bytes