Malicious PDF — malware analysis report

Static analysis result for SHA-256 8458a0389041d49e…

MALICIOUS

PDF

110.7 KB Created: 2021-04-08 01:02:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d5f118a0ff11f2adf97e341c3b6c371e SHA-1: 5f1b0174a43bdca8b6b14555a496bc3e2fb15f56 SHA-256: 8458a0389041d49e895152449c26daebfb7acf43406ef8a90ed8a7746d5c2069
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing attempt disguised as a legal document. The embedded URL, https://resalured.ru/123?utm_term=exclusive+distribution+agreement+template+australia, is the primary indicator of this phishing lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious content.

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://resalured.ru/123?utm_term=exclusive+distribution+agreement+template+australia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409123/normal_605555c7ddec5.pdfIn PDF document text
    • http://xenojupu.mywebcommunity.org/franco_benoni_defense.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/laxagefatoriwazizegisasu.pdfIn PDF document text
    • http://my-favshopc.online/how_to_program_code_for_garage_door_openerm7ueq.pdfIn PDF document text
    • http://tiwimifozukimu.medianewsonline.com/mivunibomule.pdfIn PDF document text
    • http://gelumagiz.iblogger.org/how_to_calculate_yield_to_maturity_of_a_bond_in_excel.pdfIn PDF document text
    • http://mon-cmbretagne.com/how_to_breathe_during_crossfit_workoutsmqjca.pdfIn PDF document text
    • http://italia-doc.fun/dogaminubezomugawxhchz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489595/normal_5fe41240633c1.pdfIn PDF document text
    • http://funiwigurogamu.iblogger.org/cold_mix_asphalt_design.pdfIn PDF document text
    • http://datab.vip/how_much_is_tuition_at_our_lady_of_the_lakeftxx0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/godewumazek/kazagajavojagesatarafumi.pdfIn PDF document text
    • http://lukafimagog.atwebpages.com/nugukixogifaze.pdfIn PDF document text
    • http://vapasiwivomod.epizy.com/ncert_chemistry_book_for_class_11.pdfIn PDF document text
    • http://ximewilavabav.epizy.com/mcminns_anatomy_atlas_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/33813878432.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/2086595849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e18d630-3eff-4635-b4fa-a3e6ff5a5c96/mazinijozurozenulujabiwuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f093e2a8-ef9b-4b74-bd82-f14f7ea0028b/58131178812.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_off0001753e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1753E 5620 bytes
SHA-256: 57c4ef30f37167c282acad8e69d3985facf7edc11b1f1d15a99e2ed33697d474
font_01_sfnt_off00018845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18845 10768 bytes
SHA-256: 2567cbb0cbdcffb138c9f608633354bd5439f4625ea3e0a572e2efcc88c02aac

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