Malicious PDF — malware analysis report

Static analysis result for SHA-256 5072248d0fe4931b…

MALICIOUS

PDF

81.4 KB Created: 2021-09-07 13:33:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 67dbd3b5bfe7e64d25309550f18eb447 SHA-1: f296fb091b3dd1ef000f822bdc67b7b21cc45a9e SHA-256: 5072248d0fe4931bbb64ccf2cd357f54eb403331e0f606c1df0448eba14efabe
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as a phishing trojan and an ML classifier indicated high maliciousness. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://batikatravels.com/userfiles/file/28927735254.pdf In PDF document text
    • http://cokhixnktientien.com/Images_upload/files/78912258003.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/qniqferpo7i53r803l0u75nefv/kumaber.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d18efeaa7df---wirelujodepazomereparavu.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/xebamekitifaboza.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/21993298553.pdfIn PDF document text
    • http://canadanur.com/resimler/files/65908883088.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/bujawefibotejejigized.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6e5dbdeae---neradawemabipenikudufalew.pdfIn PDF document text
    • https://masihpt2.com/contents//files/xulof.pdfIn PDF document text
    • https://irepairplus.nl/app/webroot/files/userfiles/files/filoje.pdfIn PDF document text
    • https://threadworx.com/thread/admin/uploads/file/39730498445.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/83384682903.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/82753234346.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a63ecc37b4---52396915899.pdfIn PDF document text
    • https://bauarch.bg/files/ximux.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/8f2ee5c06eb750552387a3a1a155c804/91729130217.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074057eaac87---legowefumebam.pdfIn PDF document text
    • http://emirates-offshore.com/uploads/image/file/13902500873.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/161006a24604e0---57508672054.pdfIn PDF document text
    • http://svatba-emi.com/uploads/pages/files/73428498636.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/wedawesazofozetedidiwemed.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/rabisuxuguzo.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e4b629026a9---fipisul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=classroom+management+pdf+philippinesPDF link annotation
    • 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_off0000d6f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F2 18568 bytes
SHA-256: e96d9da4f74a535699acb1370681b967a47b39bf180edb871bf7a9396a296737
font_01_sfnt_off00010705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10705 10976 bytes
SHA-256: 94482ff214244541b60273399d61a1dc7874b657feda32507ebb2d5438c48fa7
font_02_sfnt_off00012015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12015 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1