Malicious PDF — malware analysis report

Static analysis result for SHA-256 5211d40667f3d1da…

MALICIOUS

PDF

80.0 KB Created: 2021-04-27 08:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f5b1d7d93ddb69eb06b80f7273d92e12 SHA-1: 54697d5b95f40b957aaac119add8acfd88154b38 SHA-256: 5211d40667f3d1da64d7687e582ff3305fb3bd723e7aedd57a21f234255f99f2
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9995

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dafemum.ru/strik?utm_term=schlage+camelot+keypad+deadbolt+reviews PDF link annotation
    • https://tudadakamoziv.weebly.com/uploads/1/3/4/5/134596668/2403980.pdfIn PDF document text
    • https://bevabuje.weebly.com/uploads/1/3/4/8/134897483/lumobij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7d550f25-2c77-4518-95f0-20a637cd2629/lebewewajevukinugonim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a150b70-9b26-40de-a336-2faefa0dbdc7/zugek.pdfIn PDF document text
    • https://c7bff75e-0a19-4817-9d47-fca4cf08161b.filesusr.com/ugd/3b6424_5eea22da2218490295c2c040db702c84.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/14254870916.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/suletipunigepapebixi.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/70528409636.pdfIn PDF document text
    • http://berifukozek.rf.gd/no_apologies_song.pdfIn PDF document text
    • http://sinizanuj.epizy.com/banished_poradnik.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/wisujokoruru.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/kemigoditepog.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/exposition_of_the_blessed_sacrament.pdfIn PDF document text
    • https://288c7b4b-0494-48f6-8ee2-9dd519b96b0a.filesusr.com/ugd/a107db_68b47017f24b492b9309fa680fe5ad10.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jugobimuraje/75805617833.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/real_estate_finance_and_investments_14th_edition_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1cc3401-28fe-4dd3-a2bd-c025c671b1f5/gupejodased.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/73154590640.pdfIn PDF document text
    • https://d04c2b29-3777-4fe6-aaa9-ab96f87c3324.filesusr.com/ugd/43eb95_6b1afb69f8bf4c15824280a327573954.pdf?index=trueIn PDF document text
    • http://lokuvutifinulef.rf.gd/can_you_have_a_board_meeting_without_a_quorum.pdfIn PDF document text
    • http://riramemixezu.epizy.com/99763630240.pdfIn PDF document text
    • https://be1b941d-c88c-475c-9260-a39c9d088d9d.filesusr.com/ugd/5c562d_d246081fcbdb4c579512dc399389d170.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB6 5732 bytes
SHA-256: b1110e24980b6f9bd899f70122e8367b9b95cda4be128c39f8c328e411cc497b
font_01_sfnt_off0000ff47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF47 10816 bytes
SHA-256: 6f08d94d24c807f98a8e16c561845354a50e6bed10089e552c9df0cebcba72f2
font_02_sfnt_off000123f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F8 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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