Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bce10a398740335…

MALICIOUS

PDF

77.5 KB Created: 2021-03-28 12:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a69d7cbd08e83e2e780e286f6aefae54 SHA-1: 59a6ff5da3e3893ef4fdf7ed2f7c2eadd44c20c7 SHA-256: 4bce10a398740335d9d4def481666812be2a95c8649cfced004893506c593eef
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 0.9992

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://xezojetit.ru/award?keyword=beginners+guide+to+meditation+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4486743/normal_5feb222dd65cd.pdfIn PDF document text
    • http://nutosolawuxa.iblogger.org/how_do_i_factory_reset_my_kwikset_910.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428043/normal_5fc9eef37861a.pdfIn PDF document text
    • http://jufawet.iblogger.org/manual_bloomberg_espaol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467573/normal_602ee87a18d51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407747/normal_604e591bbecd1.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/2571eef1-8cfb-4226-a120-9297a61909b5/once_upon_a_time_short_story_by_nadine_gordimer_theme.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/nedewojozisegaropavepiv.pdfIn PDF document text
    • http://medemamonolusav.rf.gd/bitdefender_total_security_2020_mac.pdfIn PDF document text
    • https://8b2103c5-345b-48fd-98e3-f19c90c4efd0.filesusr.com/ugd/0e2875_7d33fb8437394d81aca8a3cb541977cd.pdf?index=trueIn PDF document text
    • https://c63359c4-faa5-40af-ad11-254ddd3d100c.filesusr.com/ugd/838c33_316f15a9a876459196d0d0d428d0b6e4.pdf?index=trueIn PDF document text
    • https://e79dab91-b8ca-4f03-a7cf-74564eaa1d8a.filesusr.com/ugd/009cd4_8084c7a802014ed1873be1f3a76956dd.pdf?index=trueIn PDF document text
    • http://nokexekakupi.epizy.com/59271480393.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/game_offline_pc_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89322cdf-7cda-4cf7-850e-fd6f8af9044f/vishnu_sahasranama_malayalam.pdfIn PDF document text
    • http://felixoxajaxev.epizy.com/tafowob.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/vowunajij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b1049c4-e0ab-4074-b624-ebdeff9096d8/akg_perception_420_condenser_microphone.pdfIn PDF document text
    • https://5e20aa6b-77ef-4f11-9344-5454fb7c649c.filesusr.com/ugd/fb3aa9_935921083d07449e8bc8219a45d1b87f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/01d83f09-73b4-4153-ba38-a7e4f29d884f/twilight_saga_books_white_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/active_viewing_guide_iron_jawed_angels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e028e49-f3c7-4308-b06f-648d937141dc/40407016158.pdfIn PDF document text
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_a0bbdd95dd2044e4b57aa159c68a5257.pdf?index=trueIn 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_off0000f0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F9 5380 bytes
SHA-256: 6d3ce05c6fd8e35db4dbcf7f849eb97e43768a545d32a34839b2f60479206e13
font_01_sfnt_off0001032c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032C 10904 bytes
SHA-256: f932a864d6c82819053778c827300160206ee517e68931dd76f6b14a20283090

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