Malicious PDF — malware analysis report

Static analysis result for SHA-256 74e744751c690109…

MALICIOUS

PDF

79.0 KB Created: 2021-04-16 07:07:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c821fb45613bd2ac74503ca51499ebf8 SHA-1: c659c6e63cc90a0d2a637557c20488c0ee55cab1 SHA-256: 74e744751c6901097bbe16a965f26a5b51a14efa467066bc987ae8629a45bdcb
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to disposable domains, many of which are disguised as PDF files. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, appears to be a lure related to a movie title, likely intended to trick users into clicking one of the embedded URLs to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://dugedepap.ru/strik?utm_term=twas+the+night+before+christmas+cartoon+full+movie PDF link annotation
    • http://armlur.space/203804426924en9d.pdfIn PDF document text
    • http://study-english-02.space/visual_studio_code_gitj9ukm.pdfIn PDF document text
    • http://sport-stavki.fun/ganatinumobozaxenetaxun2z.pdfIn PDF document text
    • http://mebel-albero.ru/20827050883c57ng.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448743/normal_601b85ae7f074.pdfIn PDF document text
    • http://azorocheat6.xyz/48972962520f77sw.pdfIn PDF document text
    • http://parralax.net/wurixalibujtmml2.pdfIn PDF document text
    • http://mon-cmso.best/california_trust_law_trustee_duties9f797.pdfIn PDF document text
    • http://helplnstagramcontact6088757.com/oC49Fuz_atay_korkuyu_beklerken2kq3r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476443/normal_605a72e03e1ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473023/normal_60215df9bc0d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410976/normal_6044d648c46e4.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://markettop.pro/turaxilanqos27.pdfIn PDF document text
    • http://nickned.me/53889400290dx12a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1423d76f-a56f-4481-bf87-726e17039346.filesusr.com/ugd/14aee2_d0d0e1b698a74476aac77dc595f501e8.pdf?index=trueIn PDF document text
    • http://duxuramubot.epizy.com/data_matrix_2d_barcode_format.pdfIn PDF document text
    • http://tefuguwo.epizy.com/44498791658.pdfIn PDF document text
    • https://6ba8113a-99dc-4618-97bf-d7180f10ff72.filesusr.com/ugd/b6edda_fd441d4540474abca9e287ffb799b8a9.pdf?index=trueIn PDF document text
    • https://8772a198-af03-49ef-8724-5feb7546cb8a.filesusr.com/ugd/436f04_f82b81641a9a41c7b2f38d3dfb146795.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_off0000f59f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59F 5536 bytes
SHA-256: 65f7456df958037001d78e26d409616749ecaf999da7b7f0d18eaea2b9ed7061
font_01_sfnt_off00010868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10868 10644 bytes
SHA-256: b241e4f779ef7ff3bf9f706679bdd2169afcdb75857a1cbd1c1ea8f0d0733240

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