Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6d9050c7ef4cd49…

MALICIOUS

PDF

75.5 KB Created: 2021-06-04 22:39:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9ecea7a2cabf82fe797ffde967c16b1e SHA-1: dcb7ba14ec4944a41a1bf80f69ab4f3ff973c689 SHA-256: f6d9050c7ef4cd49f43192167f1d9733f8eaec37d8733515018fbe22074d7fd6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/pbw?utm_term=download+film+the+chronicles+of+narnia+prince+caspian+full+movie+sub+indo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464851/normal_60464f95673f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366995/normal_604da33a6a938.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393508/normal_606a45cfc6249.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490735/normal_6014924f3ef4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464297/normal_5fe1a34aef824.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_6049ced0d0853.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408983/normal_5fe1ce13520d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495246/normal_5fcd2616666af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460706/normal_602c24b3690f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473903/normal_5fd62bae93007.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380090/normal_5fe5b7144c899.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500665/normal_60219cb8323de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408319/normal_5fed61db02414.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4485436/normal_60b0e7d2ce55c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://serizedez.pbworks.com/w/file/fetch/144599034/bopunitibanisidetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c339d2cc-d519-4169-9596-8939821dbd44/why_is_my_hp_officejet_4500_printing_blank_pages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/194be938-5426-46cd-88ed-f8ed3946078e/1969_vw_beetle_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/132e2ee3-5dcc-47fd-a761-36c69ddbbc14/how_to_fix_genie_garage_door_opener.pdfIn PDF document text
    • http://luwapoveduvi.pbworks.com/f/vujomovamefofezusenok.pdfIn PDF document text
    • http://mavujeridolu.pbworks.com/w/file/fetch/144501570/mexaduted.pdfIn PDF document text
    • http://degagogo.pbworks.com/f/canon_printer_service_tool_v4720_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5a534dc-b49b-4532-89c2-78a8a76fd1a7/93638481670.pdfIn PDF document text
    • http://xetibubib.pbworks.com/w/file/fetch/144425082/bridge_to_terabithia_book_chapter_1.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE684 5684 bytes
SHA-256: a9d575eb8b4b32cd169801ec40f3497aeabfc1c9535119c51aa2e07d6765d991
font_01_sfnt_off0000f9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CD 11528 bytes
SHA-256: f61c1c26dba1c61a7dbdcafa5f3f9b516d0ae54725e423a92da780b25c8a7300

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