Malicious PDF — malware analysis report

Static analysis result for SHA-256 69be96a29caa9c3e…

MALICIOUS

PDF

78.2 KB Created: 2021-04-05 17:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9646fc2565a350f1555084f96ec6a694 SHA-1: 5183cb8764c8043b337f5bcf56d7b6ed56e0d7b6 SHA-256: 69be96a29caa9c3e9519de26d9e61ec3d8cfc5b4a2882e011d775ad46b294094
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://fokemale.ru/award?keyword=sap+hana+basis+administration+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458854/normal_60663a51ca7ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485010/normal_5fde62e1ed3e2.pdfIn PDF document text
    • http://jisutuxoxaza.medianewsonline.com/adonis_golden_ratio_nutrition_guide.pdfIn PDF document text
    • http://silujokiz.mypressonline.com/budget_preparation_format.pdfIn PDF document text
    • http://lipexifinidoda.scienceontheweb.net/importance_of_teaching_critical_thinking_skills_in_the_classroom.pdfIn PDF document text
    • http://jirenaxapibetig.scienceontheweb.net/system_reliability_analysis.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/ahfCrt1/bluetooth_switch_for_lights.pdfIn PDF document text
    • https://cdn.sqhk.co/medugagoviji/pij0bhb/anime_live_wallpapers_windows.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445573/normal_601272ea65e17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391636/normal_605127b295d66.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/26763dea-a463-4535-95d4-49a676c83479/zagg_ipad_keyboard_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/38125000946.pdfIn PDF document text
    • http://bitines.myartsonline.com/amana_80_sse_air_command_gas_furnace_reset_button.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75c1207f-5a30-456c-899c-d9c0f57e517f/32569402492.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/top_10_antivirus_software_for_android_mobile.pdfIn PDF document text
    • https://18e7ef82-5c75-44fe-ae22-4c356c2c9ce0.filesusr.com/ugd/749e61_69abbc8e7dc24710953c04ce2470801d.pdf?index=trueIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_01e6a2ed5ac847128688f50ab5fcca7b.pdf?index=trueIn PDF document text
    • https://569e8712-2873-4b93-a654-ea71b6b809e3.filesusr.com/ugd/345929_c05247148ef74d36b9c6d377f19493a1.pdf?index=trueIn PDF document text
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_582a7e8338ab405696149856e845d1f6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/polexebuj/best_android_alarm_clock_app_2019.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_off0000f11c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11C 5492 bytes
SHA-256: afaf830193568b3f2ac542d8131e5da27d0866de5a612afbf680354d7f11bce3
font_01_sfnt_off00010393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10393 11812 bytes
SHA-256: a5203db9fcc23d2e5f1aa4c9e0ec9df94e7aa15a7bab88286461445324318839

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