Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bada4a1aaf5e2e8…

MALICIOUS

PDF

85.8 KB Created: 2021-03-04 18:18:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4777ae1d293b9ce9542d156652511fc1 SHA-1: 43c326ddf70ee202c9667898278ac7ad0b4f9d42 SHA-256: 4bada4a1aaf5e2e88dea770313d2367af51f7046ec702dd79d6a26f7abf68a37
134 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier with high confidence. The document contains numerous external URLs, many of which are hosted on disposable domains, suggesting a link farm or phishing attempt. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick users into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/wix?keyword=does+sims+4+have+a+genie+build PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366007/normal_603499c89b0ef.pdfIn PDF document text
    • http://vir-tus.com/is_the_gospel_of_mary_gnostic7sfad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447877/normal_5ff13ff7d5ba2.pdfIn PDF document text
    • https://cdn.sqhk.co/zuwiwejagub/igsggji/rakakakapabafen.pdfIn PDF document text
    • http://vadosaj.getenjoyment.net/burger_king_meatless_impossible_whopper_calories.pdfIn PDF document text
    • https://cdn.sqhk.co/xedogigiloli/zBSghNv/zawukumerozapuli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409609/normal_5fe534f99689d.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/AMgehcj/amazing_facts_about_human_body_in_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/ronuwimo/gijdheL/45439239628.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/h3jcnBJ/60233161649.pdfIn PDF document text
    • https://cdn.sqhk.co/vivakawibaki/grCHb9I/takofujevabosakibuv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480382/normal_5ffd639cc321f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484399/normal_5fdaf3a482578.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/pre_op_medical_clearance_icd_10.pdfIn PDF document text
    • http://idealicaitalia-official.site/st_bede_s_catholic_primary_school_uniform3qgr7.pdfIn PDF document text
    • https://cdn.sqhk.co/xaloridinef/ehj1jaI/37779872926.pdfIn PDF document text
    • https://cdn.sqhk.co/zurosewe/hdjfRc7/93793337586.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/ViaqhaZ/topakumejemivupuwip.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://gototura.myartsonline.com/why_list_your_company_on_stock_exchange.pdfIn PDF document text
    • http://supajiwa.myartsonline.com/the_book_thief_audiobook_youtube.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C1 5432 bytes
SHA-256: bb5bc16619bfc17a1a731ac5dfd90357bbfe8b977efe86fcb8de187e8a2c93ac
font_01_sfnt_off00010426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10426 10276 bytes
SHA-256: 6fb95bc19fe7b36623ff6d1a5a9d4f3f209b654e7f01e8cd0a12586dd354cdb5
font_02_sfnt_off0001278f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1278F 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67
font_03_sfnt_off00013c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C92 3316 bytes
SHA-256: 8348e00479eb8554653e59a51edb9defdc7ad55f86efa0fbfe01f8bb0c344bd3