Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2c5dd5b677696fc…

MALICIOUS

PDF

95.8 KB Created: 2021-06-10 00:12:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e3bba93dcccc63177e049b1377ba80bc SHA-1: 501d3e56b043f98fbee0cbdd5920e93a1db49c0b SHA-256: d2c5dd5b677696fcf80ad14325e424d9f30ac9fa3ca608e9620b603be32955c8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://philabc.ru/uplcv?utm_term=morning+shiv+bhajan+mp3+song+download PDF link annotation
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/chsr9h3r0jauv2lej3gb68d9fe/puxasogofef.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075bea293c60---17175658772.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbeca82f12---jijidu.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/kodimetisamariluvomerovo.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607191217c7c3---jelitora.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/57198494907.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/762355c98390e5b587a731ea1084d976/xebumawibogaralok.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/2032f06fb667e1a90c9d485267c7beee/petatibur.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094a6b185a15---22091027992.pdfIn PDF document text
    • https://cafe-malaysia.com/contents/file/48364159686.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/selunovisenesa.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/2a582e695239ffc7b73495fe6c1f560f/fexafudal.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/sugojavogowutulo.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/2ffefbec979e4c7fdb42c2ae6de7d541/84007432532.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99E 5500 bytes
SHA-256: 288c56a6a2dc9a6e74d6f95d1438c54f7dd618f534eff5098b1e68342068f0d6
font_01_sfnt_off0000fc29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC29 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off00010789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10789 7140 bytes
SHA-256: 353661c9991fd92bc9da7c423319b2a56f61e6c3db6dca9c0305e0292799480c
font_03_sfnt_off00011eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB1 11484 bytes
SHA-256: 251eb6d3c6ca00b7a500751b9f003ce6bf7ebe3146183d50c553dfe063b846ba
font_04_sfnt_off00014483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14483 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
font_05_sfnt_off00015284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15284 9296 bytes
SHA-256: 7319838879446560a3248e4c1d6e20f06cd4dabe830feedf5f27a929d44641a1

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